Guys singing to you in real life is just awkward, sry2say. You're staring at them and being like "uhhh... do I just glare at you the whole time... where do I look... should I appear glazed by your brilliance or be nodding along...?"
Haha I'm also probably the least romantic person in the world though, so.
Yeah...I don't know what I would do if a guy start singing to me. Though I would hope it wasn't in a public place, that would be pretty awkward...especially if he couldn't sing.
But my old boyfriend used to call me up and play songs on his guitar for me. *sighs* I have a soft spot for musicians.
It all just depends on the situation. I've had guys sing to me before (of course, it was all just in fun or because they felt like it, not because they liked me or anything like that), and I've enjoyed it. Yeah, it can be kinda embarrassing sometimes (like when they do singing Valentines), but it's also flattering. ...Of course, all of the guys I'm thinking of have AMAZING voices, so that may make a difference (although a couple of those guys like to sing badly on purpose ).