Stalemate!

34 and 63 grit their teeth as they shoved each other around, muscles flaring, soft bits juggling with the slightest movements, and their big, brawny cocks squished between their firm yet soft bodies, precum smearing each other.

In a display that shocked the scientists, both of them lunged forward to deliver a hit, searing kiss as they went to the ground, rolling around and humping at each each other, cocks thrusting up to slide on each other and between their great chests. Hands went down to grope and paw at the asses they craved. All while they engaged in a battle of tongues and cocks.

63 slammed herself atop 34 before 34 rolled them over to slam herself on 63. An effort to wear the other down that lasted all the way to nightfall. By the time they were done, they were both covered ib each others hit cum, a pool of it around them, and even their lips were still locked. It was clear further testing would be needed to see which one was the dominant of the breeders.