There is something insanely and innately sexy about going bra-less, with your breasts unrestrained by straps and fabric. If you go bra-free in a loose tee, it's a tease. You can show a little, a lot, or just enough. Maybe a little nipple can poke through, since headlights can be sexy, too. Getting dressed without a bra also requires an incredible amount of self-confidence, and nothing is sexier than that.