Imagine in a party you notice a man is looking at your friend's ex-girlfriend in a manner that sounds she has some sexual attractions for him and you want to show that guy's look when he has focused on that girl to your friend (who is your and the girls last boyfriend's mutual friend.) I would appreciate it if someone could let me know which one of the following sentences work properly here:
Look at him. He is looking at Maria intentfully.
Look at him. He has an intent look on Maria.
If they both do not work here, then please let me know how a native speaker would say the same thing. (I think the message in my question is clear.)