Any kind of sex is good as long as it is not a health hazard , Personally I like my girlfriend to wear specific types of clothing or often I like to eat food of her from special places , Perhaps we role play , You know , Like she is the teacher and I am the no good student that cant understand without a little beating heh , I am down with a little fetish and domination play ,

If you thinking about it , just look at the health hazard if there isnt , you should be open ,or else your mate will find another one to fulfill his/her fantasies