Gaining

Probably not.

You can see if they'd be willing to entertain some elements of the fetish for you- turning one's partner on is a huge turn on for some people. But it'd be best if you reciprocated and played along with things that they're into as well.

Actually finding someone in real life (besides meeting through here, let's say) who is genuinely into the fetish and with whom you share an attraction is very very rare. However, playing along with your partner's kink in order for the other to be turned on and enjoy the sex life part of your relationship, can be quite common . My wife is pretty slim, soft and somewhat chubby thighs, but far from my ideal. She is not into gaining weight at all, but thank goodness she is not a health nut either! All in all though, she is a sweetheart and will push out her belly, slap it and call herself fat just to get me going--which is more than i can ask for i must say. A full "conversion" is not really necessary.

We can't have everything, but we can compromise and still enjoy life--sex life and otherwise

It definitely happens...look at Cherries on Big Cuties. She gained a bit to please her boyfriend, and then found she loved it and kept on gaining.

Also it's common for someone to gain accidentally (e.g., during their first semester at college) and realize they're into it.

I've also heard of guys not being into bigger women until their gf happens to gain.

However, some people will never like it, in any scenario.

Can it happen? Yes.

Is there some surefire way to make any given person change? I don't think so. Some will, but most probably won't.

These posts, to me anyway, raise a question. Thought society today frowns on fat in general, but the dichotomy is: look at the number of overweight men and women, who are still married/with their original spouse. Someone has obviously either ignores their spouses weight gain, or they tolerate it, or love it. Something is going on.

Yes you can, it happen to me my girlfriend gain a lot of weight and I went from not liking fat girls to loving them the bigger the better and im know in to sssbbws...!!