Aight I’ll explain it.
In that one episode we’re SpongeBob befriends a seahorse, he goes to the krusty krab and ties his horse to a post near the entrance. 2 fish walk up to the horse thinking it’s one of those mechanical horses you pay to use. 1 of them says “I can’t find the coin slot, oh, there it is” and inserts the coin into the “slot”
The seahorse was a girl and that “slot”…
You know.