he’ll like it lmao. some ideas: if he shaves add his preferred shaving cream, what texture does he like? get something like it (blanket, slippers, etc.), what nerdy thing is he into? legos or star wars or whatever, his favorite candy, drinks, or snacks, maybe a gift card for gas or coffee or something, anything related to his hobbies, “coupons” for a massage or favor from you. any combo of these would be good i think!