Hmmmm.....let me see.......slap a ruler across your arm?......have someone squeeze the flesh between your thumb and index finger---it flippin hurts lol......chat up a cashier in a convenient store?---even if its a bloke......squat in a sitting position with your back against the wall and your arms stretched forward for as long as physically possible---without using a chair or anything else to help.......have your friend shave a patch of hair off ur head.......give yourself a paper cut between your toes.......drink a glass of 2 raw eggs......in a super market, mimic the movements of one of the customers but act like its completely normal......aaaaand finally step in dog poo bare foot