internal sphincter muscle
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Over 60 circular sphincter muscles in the human body relax releasing body fluids at death or sooner if not properly and adequately exercised. Nude personal trainers can train you how to relax and contract exercising these muscles keeping them strong
Learning to exercise all your body parts. A nude personal trainer can inspire and encourage you.Regular exercise of your internal and external sphincter muscles can prevent catastrophic injury when in the heat of the moment forceful insertion aimed at
