As much as 85% of all consumer purchases are made by females (via TomPeters.com) and I am guessing that the rest is guys buying stuff for the ladies! (joking).
Seriously though as a retailer you should be helping guys buy for girls.
Run a flower shop? Guide guys as to what they should buy. Same with wine / chocolates. In fact why isn’t there a store that solves guys problems – you could call it ‘I’m Sorry’ or ‘I Love You’.
Just give guys a guide – what do you want to say with your gift. Get the girls to help feed the input.
At the very least it says they cared enough to try. Just a thought, help guys buy for girls.