A little example from a 14th (1350) century icelandic saga:

"Bosi went over to the girl and lifted the bedclothes off her. She asked who was there and Bosi told her.
"What do you want?" she asked. "I'd like to water my colt at your wine-spring", he said. "do you think you can manage it, my man?" she asked. "He's hardly used to a well like mine"
"I'll lead him right on to the edge, and then push him in if there's no other way to make him drink" said Bosi, "Where is your colt, sweetheart?" she asked. "Between my legs, love" he said. "You can touch him, but do it gently, because he is very shy." She took hold of his prick, and stroke it and said "He seems a lively colt, though his neck is much too straight"

TO BE CONTINUED

"his head isn't all that well set", agreed Bosi, "but he can curve his neck much better after he's had a drink" "well, it's all upp to you now", she said. "Lie as open as you can and keep calm", Bosi said. Then he watered his colt generously, completely immersing him. This pleased the girl immensely, and she was hardly able to speak. "Are you sure you are not drowning the colt?" she asked. "He has to be given as much as he can possibly take", said Bosi "he often gives me a lot of trouble when he is not allowed to drink to his satisfaction"

Bosi kept this going for as long as he felt like it, and then he took a rest. THe girl was wondering where all the fluid between her legs had come from, for the whole bed was lathering under her. She said: "Could it be your colt´s drunk more than was good for him and then vomited up more than he´s drunk?" "Somethings seems to be wrong with him, he´s as soft as a lung" said Bosi. "He´s probably ale-sick" she said, "like any drunkard". "I dare say", he said.

They amused themselves to their satisfaction, the girl being now under him and now on top. She said she´d never ridden a more slowspaced colt than this one.