Sliding in the Shower

I like to masturbate in the shower, early in the morning. Before getting into the shower I immerse a silicone dildo in hot water to warm it up. The dildo is about 8' long, a little over 1' diameter and has a bulbous head which is bigger around than the shank. Then after lathering up with liquid castile soap, including a generous soaping of my anus, I anchor the dildo on the shower bench and begin to stroke my cock with my soapy hand. After I get good and hard, I squat over the dildo and let it tease my anus, eventually letting the bulbous head penetrate just within the anal sphincter. I hold this position until I'm ready to ejaculate and at the 'moment of truth', I relax down on the dildo and let it fully penetrate while I squirt. The orgasm is spastic and poweful, my anus gets thoroughly cleaned, and if I'm constipated, the soapy penetration takes care of the problem.