Dude staying clean and jerking off in bed is as simple as boiling potatoes! Just put a towel on the bed and lie on that and have another towel ready to clear up the squirt stains! I always use towels and therefore regardless of whether I'm wanking wet or dry it keeps the bedsheets nice and clean! I enjoy wanking wet using spit or lube and that can get messy especially when my precum starts to leak so towels are the way to go dude