Speaking on behalf of my gender, the man in your life would love flowers or chocolates tomorrow. But since we have our gender roles to play (and this is a tech site), any one of my Products of the Year or one of these male-appropriate gadgets would make great "I love you" Valentine's Day gifts.
Help your man improve his golf game (so he comes home in a happier, loving mood) with this cabretta leather glove fitted with sensors. Mounted on the back of the Sensoglove is a sweat-proof 1.2-inch LED digital monitor that displays and helps correct the pressure of his swing. Your duffer just needs to swing the club to get real-time audio and visual feedback to let him know if he exceeded the grip pressure target level and show him which fingers are gripping too tightly. Sensoglove ($89) is available in his and her, left and right styles.