Hah! Having 3 daughters, with only the soon to be 16 year-old left I have learned to deal with it. Like I was telling you Doc, just do all of the catering for the Valentine Day party and all is cool.
To be honest, I prefer that my daughters have their boyfriends over rather than their girl friends. Not having a son, I usually end up treating the boys like they were my son. My daughters boyfriend is a pretty good kid, and we actually watch movies together, make fun of the illogical women folk, and he gets a kick out me showing him my guitars or latest DIY builds.