You could view all the training types here as a specialised form of Drama Therapy...
a) Is strap-on training/servitude for you?
Strap-on training is a BDSM activity enjoyed where a male submissive interacts with a strap-on phallus worn by the dominant. The strap-on usually consists of a rubber or leather harness which holds interchangeable dildos, available in a range of sizes. The submissive can progress from small dildos to larger ones over the course of their training.
During strap-on training, a submissive will interact with the strap-on worn by his dominant as they see fit. Strap-on training is often part of forced feminization, slave training, and humiliation. It can also allow submissives to experience anal/oral penetration, otherwise impossible in heterosexual interactions.
The prostate gland is often stimulated here. This can cause prostate milking and an increase intensity of orgasm. Strap-on training is an effective way to make a slave more submissive, increase his devotion.
When penetration is involved, the 'straight' male may feel as if he’s behaving like a gay male. However, fantasizing about strap-ons is quite normal, it will not change anyone’s sexual preferences.
For safety and comfort, even smaller dildos should be well lubricated. When anal play or penetration is a component of slave training, the submissive’s anus should also be well lubricated.
b) Is forced feminization for you?
Forced feminization is a practice where the submissive assume a feminized role. This can include wearing women's clothing, having a feminine name, training in adopting feminine mannerisms, being anally penetrated. Part of the fantasy is the submissive is being forced into this role against their will. However, as with all BDSM practices, the submissive is not actually doing anything against their will. All activity is negotiated beforehand, a safeword is agreed upon and the submissive can ask for the play to be stopped if they have changed their mind.
The attraction in part to feminization comes from the pressure society puts on men to be traditionally masculine. A man who is drawn to things labelled feminine may feel he cannot indulge that part of himself. Having someone "force" him to do so provides an outlet for those feelings. In this scenario, it is not the man's "fault" he acted in a feminine manner. This helps relieve him of any possible guilt or anxiety.
c) Is service-oriented submission for you?
Service-oriented submission refers to a relationship within BDSM where the passive partner is both physically and emotionally there to serve his dominant. In most cases, the submissive wears a collar around his necks to physically represent the ownership the dominant has over his body.
Service-oriented submission is not limited to sex play. For example, a dominant may ask the submissive to do the housework wearing nothing but a slave collar. Within this relationship, the submissive relishes in the sensation of being controlled.
Accessories such as nipple and genital clamps, whipping, spanking, wax, or ice cube play very often form part of such relationships. Services often include fetching drinks and cleaning. Some submissives dress up in a maid or nurse outfit to bring a more realistic sensation to service-oriented submission.
d) Is maid training for you?
Maid training is a type of BDSM role playing activity where a submissive performs a range of acts of domestic servitude to please their dominant. Maid training usually involves serving a dominan. In cases like this, maid training may be known as sissy maid training.
During maid training, the submissive performs duties expected of a domestic maid. This may include cleaning and washing. The dominant also teaches the submissive how to properly behave. This may include lessons in curtsying, deportment and how to dress.
The dominant will oversee the submissive’s duties and administer punishment if they are not performed to her exacting standard. Punishments involve spanking, flogging, humiliation, bondage, confinement, or anal punishment.
Submissives wear costumes to enhance the role playing exercise, such as a traditional frilly French maid’s outfit. Costumes can help show a maid’s submission to their dominant.
When male submissives become maids, they are “sissified.” Their genitals may be shaved, they may wear female lingerie and makeup, and generally attempt to present themselves as women. These gestures help make the submissive feel vulnerable, thus reinforcing his role.
e) Is role-play for you?
Role play is the act of changing one's behavior, possibly clothing, to take on the role of a different person. Role playing during sex is used to fulfill fantasies.
Role playing is a wonderful way to explore different fantasies or fetishes, to explore something taboo. For example, pretending to be a school girl, a boundary that could not be crossed in real life. Acting it out provides in session is a safe and legal way of acting out this fantasy. Costumes and props are used in role play to enhance the experience.
f) Is petticoat training for you?
Petticoating is a type of fantasy role play involving a submissive man being coerced into dressing in female clothing. This practice originated as a form of punishment in Victorian times, or even earlier. Petticoating helps to achieve sexual arousal with a dominant female figure humiliating them.
This term is also used to describe a subgenre of erotic literature that involves this practice.
A man is typically petticoated as a punishment for bad behavior. He is forced to wear an article of feminine clothing, such as bra or panties during the role play. Some disciplinarians go beyond clothing, forcing men to carry dolls, purses, to wear make-up.
While petticoating is intended to modify the behavior deemed unacceptable, men can find they enjoy this punishment and receive sexual thrills from engaging in it. Their pleasure is enhanced by the element of humiliation petticoating brings. This humiliation may come from the actual humiliation resulting from their submission, or the potential humiliation that may come if their secret enjoyment of this practice is dicovered.
While the aim is to be humiliated, many men find a love of the physical sensation of wearing women’s clothes, clothes are typically made from soft, sensuous fabrics. Much more arousing than traditionally masculine attire.
Petticoating themes include acting like a little girl, and/or playing the role of an ultra-feminine "Sissy" French maid.
g) Is a petticoat fetish for you?
A petticoat fetish is a sexual attraction towards wearing petticoats. It can also refer to the act of wearing a petticoat for sexual play. Crossdressers are attracted to this fetish that often involves maid, call-girl, or dom-sub scenarios.
From Victorian times, a petticoat fetish was used as a form of sexual discipline and punishment.
Kinkly explains Petticoat Fetish
Petticoat fetishists are attracted to the garment’s distinctively feminine cut, silk texture, frills, and bows. This type of fetish is also present in forced feminization, where a man is forced to wear this garment. The submissive can be required to wear a petticoat during corporal punishment, or over the knee spanking. The garment can be worn for erotic and public humiliation.
h) Is sissification for you?
Sissification refers to the feminization of a male. A male submissive undergoes forced feminization or gender reassignment, loosing the hyper-masculinity he has in society.
Sissification refers to a male submissive that is effeminate or exhibits feminine behaviors. This is typically done at the request of the dominant. The submissive is "forced" into cross-dressing and gender reassignment. Generally, a sissy is a man who explores non-traditional gender roles in session.
i) Is sissy training for you?
Sissy training involves taking on traditionally female roles. The submissive, the sissy, learns to adopt ultra-feminine behaviors and perform feminine activities under the guidance of his Dominant. Sissy training is usually performed as part of a BDSM role playing scene.
The activities performed as part of sissy training are general varied, from non-sexual acts, such as housekeeping or applying makeup, to sexual acts such as being anally penetrated.
Cross-dressing and shaving are other common elements of sissy training as they help transform the male body into one that appears more feminine.
Sissy maid training is a common subset of sissy training. During sissy maid training, the submissive generally dons a frilly, skimpy maid’s uniform and performs a range of duties, from household chores to sexual acts. At all times, the maid must behave in a submissive fashion.
Sissy training is a process. It requires a commitment and trust by the submissive.