I think the bear website hashed this out once, and the conclusion was it's not brought up much on account that it's sort of awkward since people can't fully control how they smell, but it's also a very normal thing between partners. Also there's an entire "musk kink" (like the smell, not this jackass) thing among tumblr transfemmes which was neato =)

I think as a fetish it's probably rarer, but "wrong"? Nope.