What are some good truths to ask a guy?

Do you love your mother?
Can you grow a mustache?
Do you have a good job?
How often do you shower?
Do you like girls?
Boxers or briefs?
Chocolate or vanilla?

Don't question, just talk. Many boys will tell you what they think you want to hear and unless you have your own polygraph it'll be hard to know when they're lying and when they're telling the truth. When you get to know them over a period of time,  through conversation, you'll be a lot closer to the truth.

And, apropos nothing at all, somebody once said that you'll never find a user-friendly computer program that will still respect you in the morning,.

When eating chips ( fried potatoes , French fries what ever you choose to call them ) are you a  side dunker or a squirt the ketchup all overer? Overer is a word,  I think ... If he's an all overer he's a keeper ! And if he opts  for malt vinegar instead  of ketchup ... Marry him :E