Why do most guys think it is appropriate to adjust their "junk" in public? Seriously, it is plain wrong. When you are walking/standing/anything in public, you are in PUBLIC! People can see what you are doing, and trust me, most people really don't want to see your hand reach down there to adjust your b-, errrr, junk.
This is becoming a recurring problem at the university where I study, and no, it isn't sexual harassment if most of them do it, unconsciously. It is just disturbing.