Robert can feel a dull aching in his mouth, and if he could see it, he'd notice his canine teeth elongating and curling up to form small tusks. Like Mary and Jess, there's still a small part of him that is governed by his human rationale, so he trots up to face them, and grunts, trying to get their attention away from the donuts in front of them.
"L... ladies..." he strains to form the words from his mouth, "W... would yoou... care... to... toooo..."
Mary and Jess both look up. Mary tilts her head to the side a bit, trying to understand his words.
"Care to wwhhhat?" Jess asks.
"I... want... sex with you. Yes?" The sentence comes out awkward, but his brain doesn't work completely humanoid anymore. "P-p-ppplleeaassse."
"Both?" Mary asks, hopefully.
"Yyeessssss. Both. Want both." Robert then moves quickly, as quick as his form allows, as he moves behind Mary and basically flops himself on top of her, thrusting furiously.