Anyone know the psychology behind taboo in the bedroom? ?

Specifically when your girl really enjoys anal whether it's oral, touching or intercourse, as well as gets her own pleasure from giving oral and swallowing, and ejaculating on her face after sex. Also with role playing like pretending to be a young girl being seduced by an older guy, or pretending to be having sex with someone else. Should it be alarming or would it be considered to be luck finding her? By the way, she is very attractive, has a successful career and masters level education, is an only child divorced parents at a young age, and doesn't stray from our relationship. Any knowledge?