Knap Lastig wrote:
...But I do kind of have struggles with what I might like and might not like. I like the size he is now. But would like it even more if he would gain...
I fully understand you. I love my gf's body, but would love it even more and sometimes fantasize about her being quite a bit heavier. But I love it even more that she is a very amazing person, and that is more important to me than having the ideal SSBBW body.
I think there are 2 issues at play in your situation: your insecurities about what you like and his insecurities about his body.
About your own insecurities: There is nothing wrong with liking his body but fantaszing it was bigger. What is important is that you maybe not get maximal sexual pleasure, but enough to get you going. If he would let you touch him the way you would like and if you could let your FFA side more out, would that be enough for you? Tell him that you like his belly, that you think it is cute and like to touch it, but do it in a natural and gentle way.
That brings us to his insecurities: Don't bluntly tell him that you fantasize about 400 lbs guys, because if he is not happy with his current body, he might be repulsed by the idea. There is no need to label yourself as an FFA. But do try to convince him slowly, step by step that you like his body, that you don't mind a big belly and some fat rolls on a man and that you think he is very pretty. Hopefully, as time passes by, he will let you appreciate his body more and maybe start to like it. When he is more comfortable, you can tell him that you always liked bigger men.
Will he ever get to the point of liking his body? Impossible to tell. Some people get there easily and other people never do.