Why isn’t there a pregnant Barbie doll?
Ken came in a different box.
Barbie's Pregnancy Problem
Explanation
Explain Bear
Listen, dingus, you really had to ask? Barbie can't be pregnant because Ken doesn't come with the right... accessories in his own box. Get it? It's implying that he's not capable of getting Barbie pregnant. Duh.
Wade
Aaaay I’ve heard that one! That’s a good one