I sing all the time. If only I had some talent at it... haha
But, yeah. I will sing to H often. Usually he thinks it's cheesy, sometimes it's sweet, sometimes it's just ridiculous.
D called me the other day specifically to sing to me, when we were both feeling kind of down about not having much time together. He also couldn't carry a tune in a bucket, but it made me feel amazing. He made a big deal for a while about how he doesn't sing in front of people (we have mutual friends who love karaoke) and that I would probably never hear him sing. The fact that he felt comfortable enough to do so was touching.