I met a guy with this t-shirt.
Thought it pretty brilliant.

The whole lot of us got lice

The bane of many parents, the head lice is a tiny, wingless parasitic insect that lives among human hairs and feeds on extremely small amounts of blood drawn from the scalp.

Lice aren't dangerous and they don't spread disease, but they are contagious and can just be downright annoying. Their bites may cause a person 's scalp to become itchy and inflamed, and persistent scratching may lead to skin irritation and even infection.

Lice eggs look like tiny yellow, tan, or brown dots before they hatch. After hatching, the remaining shell looks white or clear. Lice lay nits on hair shafts close to the skin's surface, where the temperature is perfect for keeping warm until they hatch. Nits look sort of like dandruff, only they can't be removed by brushing or shaking them off. Unless the infestation is heavy, it's more common to see nits in a child's hair than it is to see live lice crawling on the scalp. Lice eggs hatch within 1 to 2 weeks after they're laid.