He is your friend's male maid. He doesn't trust you and is concerned that you will steal things like previous guests, so he sneaks into your room in the middle of the night to rummage through to see if you have anything hidden to take away. He doesn't expect you to grab his chest in your sleep and feel it. Your actions gives him a wave of intense pleasure that makes him addicted to it. He can't get to the top without your golden hand.