Fuck it anyways!
From Create Your Own Story
You strip, and instruct the man to tie you to the mounting bench. "It's so I won't get scared and stop," you say. "Sometimes I get ready to do something, and I just run away at the last minute. I really want to get fucked by this horse, so don’t untie me until after he has cum inside me, OK? No matter what I say." The man shrugs and obligingly ties you to the bench; all four of your hands and feet are now tied, and you're bent over doggystyle with your ass and wet pussy spread and facing the clydesdale. You can tell he's ready, and he starts to trot over to mount you.