There was a Slytherin party, and the Slyths were playing truth or dare. It was Theos turn

Theo: Truth or dare, Mattheo?

Mattheo: Dare!

Theo: I dare you to get with a girl from this party, and if you get her this month, you'll get 300 galleons, but if you don't have with her this month, I get 300 galleons from you.

Mattheo: Sounds good, deal!