I would just take him aside and tell him you're letting him escort your baby for the evening. Tell him to remember that her mother and you love her and that he'd better treat her like a gentleman would. Treat her with the same respect he would as if you were watching - because he'll never know if you might be.
Also remind him to consider what life would be like in prison every time he get's a thought in his head about anything more than dancing with your daughter.
You would not think twice about bringing charges against him for kidnapping, rape or driving while drunk if anything happens to your little girl.
You'll make him wish he was a member of the LaCross Team.