Once in a while cause it feels nice, but I would rather shower because I can focus on getting clean without waiting to draw all the water, and it's awkward to get clean in a tub. Putting on shower gel and shampoo/conditioner is one thing, but then it feels counterproductive to get clean with my ass and balls soaking in the water. Then I put effort to get clean only to feel dirty again cause of all the dirty suds everywhere.