“being forced to submit to a master or mistress”
“unlawfully imprison a person”
“forcing that person into sexual situations they’re not ready for or don’t want to be in, and taking away their freedom”
“Unlawful imprisonment”
“Forcing a person (even a transgender person) to be held against his or her will”
“Physically abusing a person”
All of the above has FA to do with consensual BDSM. Also, WTF does transsexualism have to do with this? That’s a whole different bag, although no doubt some people are involved in both.