Real answer from Reddit
Answer: from what I understand, since asexual people aren't really interested in "the nasty", they make memes about the second (or arguably, first) best thing: Garlic Bread.
In short: Garlic bread > sexy sex
But don't worry, they're not gatekeeping it. You can still do the nasty and eat garlic bread. You can even do both at the same time if that's your thing.