Not unnatural, no.
But it doesn't work for everyone. My husband and I aren't monogamous. But that's just our kind of thing. If everyone were turned on by the same things, the world would be a boring place. If my husband wanted monogamy, I could do it. We both agreed that if either of us decides that's not what we want anymore, that we'll stop. We have a very open and honest relationship. We don't lie to each other at all. It doesn't bother me when he finds other women attractive, and it doesn't bother him when I find other men (or even women) attractive. I actually like hearing about his rendezvous with other women. We have zero jealousy in our relationship, so it works. Because at the end of the day we know that we put each other first.
But it doesn't work for everyone. My husband and I aren't monogamous. But that's just our kind of thing. If everyone were turned on by the same things, the world would be a boring place. If my husband wanted monogamy, I could do it. We both agreed that if either of us decides that's not what we want anymore, that we'll stop. We have a very open and honest relationship. We don't lie to each other at all. It doesn't bother me when he finds other women attractive, and it doesn't bother him when I find other men (or even women) attractive. I actually like hearing about his rendezvous with other women. We have zero jealousy in our relationship, so it works. Because at the end of the day we know that we put each other first.
The whole tone of Church teaching in regard to woman is, to the last degree, contemptuous and degrading. - Elizabeth Cady Stanton