General

That doesn't sound weird to me. I would really enjoy having a friend to get fat with!

Sounds perfectly reasonable. I'm straight and like to encourage other guy gainers. Seems like sort of the same thing.

While I wouldn't have any issues with getting stuffed with other guys, I think it would end up more of a competitive thing than a sexual one.
Also, I would also feel most comfortable in mixed company, both girls and boys, than I would with just guys or just me and girls.

Further, I certainly enjoy platonic feederism.

I'm open to the idea of a gaining buddy even, if they were a homosexual male.

We could share tips, support one another and have competitions (eating, gaining etc...). Essentially we treat it as a shared hobby.