Often times when I masturbate while laying down, I am afraid my testicles will get twisted up or something. They seem to sit at odd angles, but only when I am laying down, and it is more pronounced when I am masturbating, so I normally go much more slowly because of being afraid to hurt them. They seem to get moved by the motion of masturbating, and I am afraid moving them will cause them to turn and get twisted or something. As soon as I stop and roll over, get out of bed, etc. they return to their normal positions. It isn't painful or anything, so is there cause for concern? Is this normal, or am I just paranoid? Thanks.