Theo didn't have much of a sex life as he was attractive only to blowflies.

"Keep dat blowfly bitch o' your'n at home next time bro'"

Brian is such a blowfly. You tell him you've got stuff to do to try to get rid of him but he just keeps hanging around!

cop:you coming down town
Bobby:damn, blow flies

Brian and Jaymz had no fucking idea what to do with pale pink lacey g-strings, both of them being professional virgins. Jaymz put them on his head, crotch over his mouth and poked out his tongue, doing his best impression of a spitting viper. Brian put them on in the right place, but his balls were hanging out either side. "Look!" he exclaimed with glee, "I'm a blowfly!"

your aunts boyfriend lee is a blowfly