amateur: Like in sports, amateur porn features individuals who are not professional porn stars. It features ordinary individuals partaking in every day sexual acts. Girl/boy next door, wives/husbands, girlfriends/boyfriends. Sometimes real amateurs but quite often professional models just pretending.
crossdresser: Transvestite, a person, and especially a male who adopts the dress and often the behavior typical of the opposite sex especially for purposes of emotional or sexual gratification.