Might as well

Despite your real intentions for washing being less than innocent, you could still do with a wash. It's not likely the weather will be warm enough to go bathing in a stream again. You head back to the stream and slip out of your clothes, leaving them folded on the river bank. The water is bracingly cold, despite the warm day. After a while, you grow accustomed to the cold and begin washing yourself. The water is rather enjoyable, especially after the long journey you've had. You take a moment to look over yourself. The hard work Ulfric has been putting you through has had a noticeable effect on your physique. While not a drastic transformation, there is definitely more tone to your muscles and your complexion is a lot healthier with the regular food and exercise. You run your hands over your body, admiring yourself and imagine what it would have been like to bathe alongside Ulfric.

You reach below the water and grasp your cock, pulling on it gently. The cold water dulls the sensation somewhat, but imagining Ulfric's body makes up for it and soon you're massaging your hard cock. Sleeping with Ulfric last night was such a turn on, but you've not had a chance to take care of the resulting horn until now. You stroke the length of your cock rhythmically and finally release your load into the stream. You see the clot of spunk rise to the surface of the water and gently float away on the current.

Feeling relaxed, you give yourself a final rinse, then head back to camp. When you get back, you find that Ulfric has already broken camp and is ready to get back on the road.