What’s the best part about having sex with twenty-six year olds?
There’s twenty of them.
What’s the best part about having sex with twenty-six year olds?
There’s twenty of them.
Listen up, you dimwit. You think this is about actual sex? It's a numbers game, you moron. The joke plays on the phrasing "twenty-six year olds" and how it sounds like "twenty of them." It's a pun, you walnut. The punchline makes you think that there are 20 people, rather than just a group of 26-year olds.