Too Small Clothes

This is a bit of a departure from the usual (at least I think it is) and lord knows, I'm no fashion expert, but I gotta ask,"What is up with the shirts girl's/women wear that are like they were shrunk in a hot water wash and then a hot dryer? Actually I don't have anything against the look, in fact dare I say I like it, but what I see are girl's/women spending 90% of their time tugging the bottom of the shirt down to stretch the material out defeating the open midriff 'look'. I'm thinkin', "What's the point?" You didn't know that if you bought a tight fitting/too small top that it wasn't going to naturally ride upwards (or downwards as in the case of the those (I'm sorry, but they're morons) who wear their pants 'low' so that their ass is all out in their boxers).
I don't get it.