[Allen chuckled a little at the reaction, but it was all in good nature. part of him was rather surprised Luke never heard of it before, what kind of lame people had he been playing with?]

To utterly humiliate the loser and claim dominance.

[He say's with a perfectly straight face. But no, he was teasing him really and this shows in his face in the next moment.]

I'm kidding, it's all in good fun really. I don't plan to keep your clothes or whatever, also it makes it harder to cheat when you have no sleeves to hide your cards.