If you are a regular guest at his place, unisex face wash, bougie toothpaste, and some sort of non-European-sounding moisturizer can all be smuggled in with minimum fuss. With any luck, he'll read up on what you bought him, and you can spare him the anxiety of picking the stuff out on his own. And don't freak out if you see a dope kit from Keihl's hidden underneath the sink a few months later. He's just exploring.
Kiehl's After Shave Balm, $18, available at Kiehl's; Botot Toothpaste, $16, available at Old Faithful Shop.