Already done it, but in my case it was my daughter. It's no big deal, she wanted to practice as she was given her first make up,and it was easier for her to use me. Any dad would do the same.
Of course I may not be the person to ask, I've already got a dress picked out for next weekend. A friend of mine has asked me to go on her hen do, so I thought I would dress appropriately to make her laugh. I do pity the guy who see's me from the back with my hair down to the small of my back, he's is going to get a hell of a shock when I turn round and he realizes I'm a man. ;-)