If hes giggling hes not serious! LOL LOL LOL !!!!!!!!!!!!! stupid guy ^^^ if they just pop out the question at random, then its a dare....but if you've known this guy for a long time, and you're...
ask some random lady out or kiss a pole in front of a hot grl or make out with each other!!
kiss a teenage girl; eat a raw egg; wax part of your leg; chew gum you found on the bottom of the lunch table
Dare him to let you give him a front wedgie for as long as you want