Sometimes you need to make threats!

[iCraig]

Originally Posted by Admiral Huddy

3... Embarrass her by asking her next time she brings her boyfriend round..

This.

Just do a DIY project, such as putting up some shelves, whilst he's visiting.

45 mins later, the lad will be in the fetal position on the floor, your daughter will be trying to extinguish the flames on your head (burning quicker due to Just For Men being flammable) a powersaw will be buzzing around the room, various plumbing and electricals will be shorting out, blowing out several local transformers, putting the National Grid on yellow alert.