Most of my pants have gotten big on me, but it feels wrong to go out and buy new ones when these work fine, so I've been wearing them with a belt anyway. The problem is that when I sit down they bunch up around my crotch and it looks like I have a massive boner when I don't. Obviously, I don't want this to keep happening and am wondering if anybody knows of a way to fix this. I have relatively little expierence with sewing or tailoring but I do have access to a sewing machine. Any advice would be appreciated.