not in a relationship now, but when I was, yup, he did check out other girls. I'd get irritated for about 2 seconds and then get over it. guys don't seem to be able to help it. he never ogled at other girls, so it wasn't a big deal.
Yes and I look at other guys. We both notice it, it isn't a problem. Occasionally I'll comment on the girl he's looking at or he'll point out a guy he thinks I'm looking at and we'll feign jealousy or just rate them...making it a game.