Sexuality is a great venue for roleplaying. Immaturity, however, isn't.
I've played with the guy before. He usually ends up role playing a prostitute, so it's not entirely juvenile, though I am slightly disturbed by the frequency at which he plays them. The rest of the party is essentially eragon with a bat instead of a dragon, a master thrower with hammers, and a sacred fist/fist of the forest.
Should this thread be about designing a female companion, an adventuring cohort wife, lover... I'd participate. "Whore", "Prostitute" implies an immature and potentially abusive at worst, a debasing view of another at best, and therefore I'm willing to voice my disinterest.Also, it's funny to see people being so shy on the matter. What's so innocent about D&D that sex becomes a taboo topic? D&D is a limitless medium of cultural experimentation and sexuality is very much a part of every culture, no matter how primitive or advanced.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.