Thanks all for your replies!
To clarify, I do not dress provocatively AT ALL! It's just that when I'm doing stuff around the house such as reaching for the above-the-sink cabinet my t-shirt will ride up. That's when my son will say stuff like, 'where did you get that ugly shirt?!' And I've been wearing it for a few years and he hasn't said a word about it until now....

So anyone living with an adolescent/teenage boy would need to be careful about showing skin....?