The tiger's scent was very strong in his nostrils, an almost bitter musk that enveloped his senses. The huge beast was all around him now, powerful forelegs at his back. John dropped to his hands and knees and started to crawl slowly backwards under the tiger's chest. Its rumbling increased, and it shifted forward a little. John was startled to feel a hard prod against his rump and realized the tiger was male, and very aroused!
If he scrambled out now, John felt pretty sure that the tiger would not force itself on him. But the scent of the tiger was already becoming attractive, and John was feeling odd dampness in his rump. Once he started with this massive tiger, John would end up as a tigress.