I am pre-testosterone, and I find that every time I wear boxers or basketball shorts they ride up and it gets very uncomfortable. I don't know why it does this, but I believe it to be because of my unfortunately feminine hips? Am I the only one? Is this because of my hips?
if your hips are significantly wider than your waist, stuff is gonna tend to ride up. that's also what causes full length binders to roll up. happens to me all the time, it's just one of those things :/