Diaper Duck, One of the things that I had to do when I was your age was to make it clear to my family that I was no longer a child and that I intended to lead my own life as I wanted to live it. An important implication of that was that if they wanted to have me around, they needed to stop trying to manage my life. If your mother won’t stop nagging you about the kind of underwear you want to wear, make it clear that you will spend much less time around her. If that’s not possible for example because you’re still financially dependent upon her, it’s time to become financially independent so that you can live the adult life you want and need to live without her harassment. You’re a grown man. So start acting like one.