Well my 12 year old asked what a condom was. We were eating dinner and she just kind of casually asked what a condom is. My other 2 kids at home are 19 and 17, with the 19 year old preparing to go on a mission. They both said "oh you don't want to ask dad THAT question". My wife and I tried delicately to explain what a condom is, trying to be kid and dinner table friendly. About half way through she had this disgusted look on her face. Then said "wait wait wait..." handed me a bottle of mustard and asked "I thought this was a condom". We both got real quiet while my other kids just busted up laughing. My wife just kind of whispered "no, that's a condiment". The 12 year old just said "oh" then went back to eating, giving me and my wife some weird looks the rest of dinner.
I can't imagine what she thought we were doing with the mustard.