Story from Sex. Want A Casual Sex Buddy? If movies about finding a friend with benefits — like that one literally called Friends With Benefits — are to be believed, then you can expect to just fall into a casual sexual relationship whenever you want one. But real life isn't like the movies, and if you want a sex buddy, then you're going to have to put a little effort into finding one. Just like looking for a real relationshipyou can go about finding a friend with benefits or fwb, if you're trying to save syllables in one of two ways: either online or IRL. Going the Tinder route might be easiest if you're a lil' bit introvertedbecause you don't have to look anyone in the face and ask if they're into casual sex. Just make sure that you're clear about what you're looking for upfront, says Emily Morse, PhD, sexologist and host of the Sex With Emily podcast. But don't be too vulgar or rude.