Well if you are going somewhere and you are at a friends house thats when there is a point. Because your bra will be soaking wet and cold and if you only have one or the froze both, you will be left braless. Unless your friends wear the same size.
There isn't one. If I found my bra in the freezer, I'd take it out and beat the person who did it and be pissed all day... XD If guys want to see a girl be a bitch the whole day, that's what they need to do.