Alright, let's talk about endurance. The training I do daily has given me a strong core, great cardiovascular conditioning, and improved flexibility. Combined with having next to no fat on my stomach, I can continuously hump at varying speeds and angles without necessary having to slow down for long periods of time, and without becoming too exhausted for it to ruin the moment. Also, if fatasses can supposedly go longer because they're chemically closer to females than us (hahaha...), I imagine their dicks just don't work as well the rest of the time either. It's probably less like "I can go longer before orgasm!" and   ffa  more like "I have permanent whiskey-dick regardless of my blood-alcohol content."