Interesting. All the women I know who are with non-dancers have fabulous relationships. The men have their own passions, and each partner shares in each others happiness with those passions. These are strong, independent women, the men knew it going in, and they wouldn't have it any other way. And the men have learned to dance a bit socially, just for the joy of being with their woman, not because they asked him too.
Let's face it -- men who dance are going to be exposed to temptations, and their partners will always be suspicious. The reality is that men will give into temptation more often than women. It's just not going to work out if the man is out dancing and the woman is sitting at home watching TV.
Now that I'm into dance I will avoid serious relationships with women who don't. I learned my lesson the hard way.