Most Helpful Girl
Some styles of underwear will tend to slide down WITH your pants. I'm definitely conscious of whether my crack or too much of my underwear is showing in public. If I can't get my pants to stay up to cover it, I'll pull my shirt down to cover it if I can. If I'm just around friends or something, I'm not as on top of it, because I'm more comfortable and I know I'm in the presence of people who don't care. None of them are going to be offended by my crack. =P Doesn't mean I show it off, but if the top of it is showing I'm not going to make a fuss about it.