Character development? It might not directly impact the plot or move the story forward, but how a character relates to sex can tell us (the audience) a lot about them.

If you want to fuck property, buy a fleshlight not a dog?

Red alarm!

Well. He’s wrong.

“Whoever wrote on that wall had terrible penmanship! I’m out!”

And a DS9 episode

Key features about to make like that license plate and leaf.