Receding Hairline

Alright listen up, buttercup. This joke is about a kid whose hairline is receding, making it look like he's balding way too early. The stranger thinks he needs hair growth products, but the kid's all, "Nah, it's just my hairline chilling way back there." Then the stranger, realizing the kid might have bigger problems, suggests a doctor. It's funny 'cause baldness ain't usually a kid thing, and it's even funnier 'cause you probably don't know what a hairline is.