you lost ya money fair and square, I've seen pros on pokerTV do this on HSP in a casino, even though it wasn't a tournament

Set the rules up before the game, maybe write them down to look at the rules if you forget anything, but honestly in a home game I think it's best that none of the rules are seriously adhered to and just try and have fun. There wasn't a rule about this before, so he had every right to take the money from you seeing as you prolly gave off a tell or something. Quit being so pissed about it tbh...

I'm sure there is a tournament which allows this btw