I had a roomate in school that would ask 3 questions.
Do you like peanut butter?
Ever been to Alaska by MTA?( Boston Subway)
Wanna Fuck?
75% would freak out and walk away. Another 20% would slap him or dump a drink on him. But, 5% would laugh and relent.
5% was a hell of a lot better than most of us were doing.