...fuck the first female who got to him! He didn't feel like stalling any longer than he had to. Sure enough, one tugged at his leg and he bent down to her. She surprised him by pulling him in for a kiss, which felt ticklish but oddly nice. After that, she spread herself on the ground before him, making her intentions unmistakable.
Agreeably, Ty knelt down and positioned his shaft along her moistened lips, slowly pushing inside- to which she responded by wrapping her hands and feet around his arms and legs (reminding him he wasn't fucking a human). He had enough of an ability to move his hands to reach for her chest, and smiled as he saw her convulse with pleasure when he rubbed her nipples. So that isn't just a human thing, he thought.
He noticed she had grown wetter and looser, and took advantage by starting to pound in and out of her. Appropriately, he bent down and positioned himself into a mating press, thrusting harder and faster and more eagerly. He simultaneously kinda forgot he was fucking an animal and felt more acutely aware of his own animal desires, his hips moving almost outside of his control. All his conscious thoughts were focused only on the knowledge that he would fill her with his seed and most likely get her pregnant. Judging from her appreciative noises and how she clung to him, she seemed to be anticipating it just as keenly as him.
Soon, he groaned with pleasure and released warm, thick strings of cum inside her, most of which leaked out as his semen easily filled her. He leaned down and clumsily kissed the bonobo's head, before pulling out of her, seeing the sticky white puddle of his essence that he'd left.
Inside Ty's lover, with the barriers of biology removed his energetic human sperm sought out the bonobo ovum as keenly as they would one of their own kind and set about fertilising it, eventually guiding it to implant inside her womb.
Ty and his lover shared one more interspecies kiss, and then Ty decided to try something else...