Why do women rub their eyebrows? They don't got balls to scratch!
Eyebrow Rub
Explanation
Explain Bear
Listen here, lil' buddy. This joke is so simple it's insulting. Basically, it's saying women rub their eyebrows because they don't have testicles to scratch. I know, I know, it's not that funny for a smart bear like me, but hey, some people find it hilarious. Also, 99% of people can't lick their elbow. Go try it.