Seb has a pretty cool jerk-off technique. He jerks his uncut cock in a standard way, but when he gets close to cumming, he just slowly pushes down on his cock, teasing and edging it so it spurts "hands free"
He actually nuts 3-4 times in his homemade video, but I think the last time shoots it is pretty clear.
He had his girlfriend film him take a shower too.
