That's sound very interesting, can't you try to write it again or at least give us a detailed synopsis of your idea?
Damn, Id love to read that as well!
I don't know how detailed it's going to be, but the gist of it is that Sara Jay, Gianna Michaels, and another well know pornstar (pick your preference) have decided to shoot a scene with the biggest dick in porn. However, Gianna and Sara Jay each extended an invite to a different guy resulting in both Mandingo and Napier showing up. Both are confident that they have the biggest dick and so after some egging, both drop their pants and have the women get them hard for a comparison.
Between length and girth and curvature differences neither man can be declared the biggest, but as they're sized up alongside one another for a final comparison, unwilling to back down, Mandingo slams his dick sideways into Napier shaft. The effect is like two ocean liners colliding, getting an amused 'ooo' from the women, and Mandingo does it again this time getting a grunt from Napier.
Not wanting to be seen as inferior, as Mandingo mugs confidently for the women, Jack slams back, causing Mandingo to visibly stagger, unprepared to such a sizable assault on his cock. For several minutes the two's huge cocks jostle and flail back and forth for a clash of titanic proportions. Alongside the women indiscriminately cheer the two on, actively fingering themselves and one another for encouragement to keep to two black behemoths totally hard.
At some point I wanted Mandingo to manage to get his dick beneath Jack's and begin to lift his huge dick with his equally sizable shaft, forcing Jack to back up to prevent his cock getting pinned against his body. He'd eventually get back against the wall, allowing Mandingo to start thrusting his cock head-on into Jack's mid-shaft, getting an agonized groan out of him with every impact before finally twisting himself free.
However, Jack would still be trapped against the wall, and his full size, but no longer fully hard shaft would start getting smacked back and forth by Mandingo's, making him grimace with every hit. Now holding a solid advantage, Mandingo would mercilessly taunt Jack, purposefully letting Jack's cock start to recover before smacking it to the other side.
Growing weary, Jack would then look over to the women, eyes gleaming lustfully as they watch Mandingo take the lead, kneading their breasts and pinching their erect nipples. The sight would spur Jack's erection back to life, and as Mandingo goes for another side strike, Jack gives his cock a powerful flex, stopping Mandingo in his tracks.
Shocked, Mandingo is left off guard as Jack pushes his partially revitalized erection directly into his, grinding their mammoth shafts against one another, and giving a long groan; both of pain and pleasure as he'd gotten worked up from his dominance over his rivals similar sized dick.
Jack presses his advantage but Mandingo's not about to let him retaliate without a fight and pushes back, their hulking rods struggling against one another in front of the women's eager eyes, and begin cheering and moaning provocatively, trying to spur one or the other to either finish his opponent off, or inadvertently end up getting off.