Sheesh, he sounds like a big kid himself. Are you sure you want to invite him at all?

No, you are right. It is your house and your party. You get to set the rules. Hopefully he was just being clueless.

The only thing I can think to suggest is making the wording in the invitation very clear: instead of "Adult party" say "Please, no children" or maybe "this event will not be appropriate for children." Possibly include the reasons why, but some people take explanations as an invitation to argue. ("Oh, no, my kids can handle it...")

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Haunt pics: 2005, 2006