Dating Arsonists

Alright, listen up, smarty pants. This joke is about a person looking for arsonists (you know, people who like to set things on fire) on a dating site. The punchline is a play on words because "matches" can mean finding someone you like on a dating site, but it also means the things you use to start a fire. So, the joke is that this person found a lot of people who like to set things on fire. I bet you didn't know that you are 50-65% water and you have enough iron in your body to make a small nail. Bet you didn't know that!