How can you tell you a guy is a jerk?

Most of the time you cant. they will put on a good act and you won't find out till later. others you can tell straight away.

best advice don't let smooth words and a handsome face sway your judgment.

Let him talk a lot or ask him questions more than just yes or no answer questions. Jerks can give themselves away when they talk.

1) He asks if you would suck his friend.
2) When you talk he stares at your Breasts
3) He says F you or calls you a "B" basically curses you out
4) He tries to clown you in front of people
5) He ignores you when he's with his boys
6) His boys try to get with yo or call you (obviously somethings not right)
7) Jerks have certain looks seriously they look like idiot