I think the only commitment men usually want is that you'll commit to giving them unlimited bedtime fun. Once you give them that, then mission accomplished. Then the question becomes, why buy the cow when the milk is free. Perhaps instead of when you first give it, you should think of how often you give it afterwards and why. I would advise to be very stingy and when they ask, tell them what you want - marriage, exclusivity, or whatever the heck you are calling "commitment".