Freak
In the gay community: A guy who likes to fuck raw, without protection, is open to explore some sexual limits, and likes it a little on the kinky side.
Grindr Profile: "Freak top here, like to fuck bare and make you sweat"

Guy to his friend: He is a freak in bed, he fucked me raw and it felt so good.
Friend: Aren't you worried about HIV or STDs without protection?