Not sure if this is intentional or not, but you can use a bed while riding a horse, then you and the horse are in bed together.
Clearly the horse is hiding under the sheets, but it gets weirder, once you wake up you realize you had a 3some with a random heartling, who is still sleeping in your bed.
But once you interact with the bed he disappears... I was like... what?
sorry have not been sleeping for 2 days.