Brothers delay their sister's maturationNot only are brothers, like, totally immature, apparently their immaturity is contagious. A new study has found that having brothers delays sexual maturity.

According to the study, which was conducted in Australia, having older brothers delays the onset of menstruation in girls by nearly a year on average, whereas having a younger brother delays the beginning of sexual activity by more than a year. The researchers think older brothers may physiologically delay maturation by being unruly jerks absorbing parental resources and applying Dutch rubs psychological stress.

They think younger brothers delay sexual activity by making their older sisters take on care-giving roles. Riiiiiiiight. It would have absolutely nothing to do with how incredibly repulsive teenage boys smell. Oh, that smell. It haunts us. It really, truly does. There's a reason those little men have to drench themselves in AXE body spray.

Still, it's nice to know that's why we didn't get laid until we almost qualified for a Judd Apatow film (assuming he would ever cast a female in a lead role). It wasn't the baggy clothes and bad attitude coupled with the fact that a bad haircut forced us to shave our head that one summer -- it must have been the cumulative effect of having so many little, stinky brothers.