There's a documentary called Donkey Love, it's one of the most entertaining things I've ever seen. This guy explains that his donkey gets him in trouble with his wife when he comes home late at night, clothes full of hair around the hips and waist. His wife is like 'he doesn't want to be with me but he does visit that donkey', the guy explaining the benefits of not having to buy donkey new shoes and such.. Highly recommend but I don't know where you can find it nowadays. Should have aired at Sydney film festival but a few days before they decided not to.
Anyways if I'd be caught it would be standing on a mounting block behind a mare.. Probably pull up my pants and step down followed by awkward silence and sorry you saw this.. the rest would depend entirely on who they are and how they respond. Way way back someone walked in on me fooling around with my girl, I wasn't caught red handed, pants still on but she knew exactly what I was doing. I think it just confirmed what she already thought as she commented before when I was cuddling 'that's intimate, very intimate' in a sort of disapproving tone.