Laughter fills people with joy and happiness. A release of endorphins and your feeling great. Why not capitalize on this when you are proposing. You certainly could. The key is to not make the proposal a joke but have the laughter flowing before you pop the question. Then, when the time comes, with a smile on your faces, ask for her to be your wife. It would work well for anyone to get a laugh or two going before the big question. That’s not for everyone tho, and roaring laughter wouldn’t fit most people’s repertoire but, if it does, capitalize on this. If that’s who you are, she will love to laugh with you. The moment you ask will be that much more special!