Olivia Munn gifted her fans with some drool-worthy eye candy when she took to Instagram on Saturday to wish a male friend a happy birthday. In the pic that she shared, the 40-year-old X-Men: Apocalypse star dared to bare a great deal of her perky chest by only wearing the bottom half of a bikini. She was posing with the birthday boy, and a number of her 2.8 million followers couldn't understand why he was directing his gaze away from her exposed skin.