Think your guy knows everything about you? think again. A new survey by British beauty retailer Superdrug found that a whopping 40% of couples have fought over the fact that the guy can’t remember super important details. Twelve percent of men surveyed don’t remember their other half’s birthday, while 39% don’t remember her bra size. An additional 10% have no clue what their significant other does for a job. Cell phone numbers top the list of things men forget about their wives of girlfriends at 54%.