having a friend play your money

Question-- I have staked (sp?) my friend numerous times in bigger games. He is an excellent player and I trust him. What I usually do is tell him what you lose is on me and I take half of your winnings. Is this fair for us both? I only got this idea from Rounders. Is there a better way to stake someone? So far I have done this like 5 times and he hasn't lost yet.


thanks stud