i think it might not be worth it, and here's why:
from your description, i don't think you can enjoy it without being smacked in the face by the reality of their bodies. if they both had good bodies and busted faces...you could work it. a grill is easily enough avoided, right? but if you're worried about unappetizing body parts, fattage, etc...you won't be able to escape the whole deal, unless your eyes are closed. and that's not much fun. the "logistics" (poor use of that word, but whatevz) will it make it a low-probabilty situation.
on the other hand, if you're hard enough to punch through walls and need a couple of sacks of dough to violently pound into the bed, abuse, hate like the shitty world itself, etc...maybe you can get past the sad story your five senses will be telling you during the act.