Copied from a website which came up on a google search....... "Fiction: I can't clean my horse's sheath unless he drops his penis -- which he won't do unless he's sedated. Fact: You can do a very thorough job even when your horse hasn't dropped -- simply by reaching up inside. In this case, you'll need to go in up to your elbow, so wear a long disposable glove to avoid getting the greasy, smelly smegma on your arm and sleeve. Ask your vet for an obstetrical glove -- it's perfect for the job. You'll also need a bucket of warm water and about 20 heavy-duty paper towels. To clean your horse's sheath, put a generous dollop of sheath cleaner (about 2 to 3 tablespoons) in your hand, along with a wet towel. Reach up into your horse's sheath, and gently work the accumulated grime loose. When the towel gets soiled, grab a new one, and keep working until the towel comes back clean. Clean all the way from his sheath's opening up to the base of his penis. Depending on how dirty the sheath is, you may need to use additional cleaner as you go."
RE: that just begs the question Err, I wasn't....... but please let's leave it at that, eh. DON'T ASK !!!!!
You can even have a choice of colour for the obstetric glove. I can supply an orange one or a blue one. Which one do you fancy?