ragskuttle: Yes of course its ok. With MUTAL CONSENT everything is possible in the bedroom, because, lets face it, doing it the same way every night get a little tedious. Why should your mind not take a little enjoyment too and join in with a fantasy role play. Mind you, if that is what you are after specially either as a dominant or as a submissibe then there are specific sites which deal with those specific sexual demands.
I tried one of those sites, rags, and they banned me for being too dominant.......