What do women and peanut butter have in common?
They're both easy to spread.
Peanut Butter
Explanation
Explain Bear
Alright, listen up, buttercup. This joke is saying that women and peanut butter are alike because they're both "easy to spread." In other words, it is implying that women are sexually promiscuous. You probably just thought someone was spreading peanut butter on bread, huh?