My wife is really short (5 feet even) and pretty small (100 pounds). We've always dealt with it, but it's getting worse now. People constantly think she's 15 years old. She works for the USPS and has been stopped multiple times by people (and the police once) for thinking she was too young to drive and/or work for the post office. She gets carded at rated R movies, and once she got yelled at when I bought beer at walmart and she went to put the case in the cart after checking out (I guess minors can't even touch it?). One time we went to Applebee's and some 85 year old waittress asked me if my daughter wanted the kids menu.
It's starting to rustle my jimmies. I assume when she gets pregnant, it's going to get worse.
Edit: She's 29 and people think she is 15.