User blog comment:TheLostGreatBeing/Lil' Sis's B-Day/@comment-453181-20100926013411

I'm glad I don't have any siblings. Here's some advice.

Threaten the girls with something they consider disgusting (snakes, insects, vomit). As they back off, close your door, lock it, and play rock-n'-roll music, and put up a picture of a centipede to keep them away.