Ironage has gotten alright in terms of certain things, but there is still a "oh, my favorite couldn't do that, but this other guy"....... attitude among some guys. I don't think Sprague would've had a problem, but the photos in that link probably killed it. It's one thing to read a gentle description of that stuff, but seeing photos of the guy buried face deep in man ass is another kettle of fish.
Curiosity got the best of me and I read a scene break down - Drasin does a nude posing act. Callard does the same and some touching with the other guys. Birdsong and Sprague are involved in the heavy stuff.