As a man, you can never have too many cordless drills. No one knows why. If you cannot afford a cordless drill, buy him anything with the word ratchet or socket in it. Men love saying those two words. Again, no one knows why.
Men love gifts for their cars.
No one knows why. Do not buy men socks. Do not buy men ties. And never buy men bathrobes. I was told that if God had wanted men to wear bathrobes, he wouldn't have invented Jockey shorts.