All the mammals that wouldn't ever be on a farm leave, disappointed. Which just leaves you with three remaining candidates;

A well endowed stallion. His sheath and balls are massive and hang low, the balls being about the size of basketballs to your lustful eyes. He seems to wink at you, flicking his tail over his perfectly sculpted hindquarters. He has a bit of a belly, but you wouldn't call him fat, just not skinny. Not that you're complaining, it just brings your attention to the wide mouth he has. Perfectly good enough to eat something a bit larger than an apple.

A prize winning bull. This bull has sired dozens of healthy calves, and the size of his package wouldn't have been a problem. It's massive! And his rump is high quality. Perfect for steaks, except the only thing that's going to be eaten here is you! Speaking of eating, because his stomach, like all other cattle, is divided into four separate compartments, you'd be spending plenty of time inside his stomach.

A well fattened pig. His girth is massive, and you probably couldn't wrap your arms all the way round his belly. Which you might be trying, because this particular pig has a look in his eyes of both lust and hunger, and any experience with him is sure to be unconventional to say the least. Like the other two, his assets are large enough to put even the most well-designed porn star to shame, and he looks like he's had plenty of opportunities to use them.

So, all very sexy animals, but you can only have one: