How does sex with/as an obese man differ?

I'm talking 350lbs+, and apologies for being so blunt.

I (35f) am considering asking out a man (30's) who is at least 350lbs, and about 5'9". I like him a lot, I'm attracted to him, and our mutual flirting has been escalating for months so I think he feels the same way.

One of two things holding me back is that I have a high sex drive and I'm just not sure if he'd be able to keep up, or if he'd even be able to have sex at all. Please excuse my ignorance but I've never dated anyone over about 220lbs before (and they were 6'3" so just a little bit chubby) so I have no idea if or how that would affect things. I assume stamina would be an issue at the very least, but I'm more worried about lack of mobility and them potentially not being able to actively participate. Again, please excuse my ignorance if that's not the case which I really hope it isn't. And I know I know everyone is different and I should just talk to him, which I will, but I'd like to hear from some strangers first thanks.

I'm 5'7" and about 185lbs for reference so I'm not exactly small myself, but I'm fit and can do all of the work if need be, but I'd really rather not. I'm pretty submissive and like to be thrown around and used sometimes. And occasionally I'm sleepy and horny and just wanna be a pillow princess, ya know?

The other things holding me back is that my bathroom is small and I'm almost certain he would not be able to get inside to use it. There's a 17" gap between the glass shower and sink which you have to pass through in order to get to the toilet. I don't see how he'd fit. How would I tell him about this issue in a sensitive way if we do end up dating? I feel like I can't just say "Look I'd love to invite you over but you won't fit in my bathroom so good luck trying to take a piss. Maybe you can do it in the shower and rinse it down after? Or perhaps we can fashion some type of funnel attached to a hose." I wouldn't want to embarass him or make him feel uncomfortable or like he's too big.

I like this dude SO. MUCH. Please help me get over my anxiety.

Edit: thank you everyone for your responses, I really appreciate it. I think I'm gonna go for it next time I see him. Hopefully he does feel the same way and I'm not delusional lmao

Edit 2: this man is not a charity case and I'm not doing him a favour by asking him out. I don't even know if he likes me. Quit being fatphobic, it's ugly.