Ty felt a little overwhelmed thinking about a fucking opossum of all things this way. But a moment later, it got weirder still. An even more potent scent reached his nose, and he lost interest in the opossum- and the issue of where it might be coming from. His body responded with intense eagerness, an erection rising between his legs that felt harder than he ever had before. He hastily wished no one would notice him leaving the house and he could get back in whenever he wanted, and left as fast as he could, starting to scour the neighborhood.
At last he found the source- a rather large female rabbit in a little glade near his house. Her tail was raised, and from the moist folds under it the pungent smell of pheromones had been drifting.
Shamelessly, Ty undressed, pulling off his T-shirt and jeans, removing his underwear to release his penis (and prompting the animal to look at him with a hint of anticipation), even removing his shoes and socks to feel more in common with the nudity of his feral partner.
Ty got on all fours above the rabbit, and to his relief, he managed to ease himself inside its tight slit, gasping at the warm, constricting sensation. Its hips rolled back into him to take more of his shaft inside, and he groaned in surprise and pleasure. He too felt his hips take on a mind of their own, and he pumped and pumped and pumped into it, the horniness of a teenage boy and a rabbit in heat complementing each other perfectly.
After a while, Ty hit his peak, and his cum shot inside the waiting animal's vagina. He kissed its head softly and pulled out, looking at where his essence leaked from it with a weird, unfamiliar sort of... pride? He wasn't sure that was the nice word, but it felt like he'd done something good by mating this animal.
Inside the lagomorph womb, Ty's seed had found the source of its heat and was wearing away at it- or rather, at them, for the rabbit had produced a litter's worth of eggs. Each and every one was fertilized by Ty's sperm, and he had not only relinquished his virginity, but become a father. Not that he'd have to raise the litter, thankfully.