What's the difference between you and an egg?
An egg gets laid.
What's the difference between you and an egg?
An egg gets laid.
Okay, so basically, the joke is saying you don't get any action. The punchline plays on the double meaning of "laid." Like, an egg gets "laid" by a chicken. But the joke implies you don't get "laid" in the sexy way, which is kinda sad for you, my dude. I bet you look like an egg, too.