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By using chastity device like this one along with constant monitoring and rewards

TPE + Silicone Vagina & Anal Masturbator that is Super Soft

If you don't feel comfortable pouring the oil directly from the candle

Make your partner submissive by caging their penis with this Strap On Underwear Cock Cage

You can follow the steps below in order to use a 100cm sex doll:

Male Glans Auto Stimulation Masturbator color-white By using chastity device likePREMIUM Male Vibrating Masturbator Cup Glans Penis Electric Stimulation Model Number: Vibrating Male Masturbator Cup Pocket Pussy Vibration Modes: 14 speeds Material: Medical Silicone Waterproof level: IPX7 Battery: 3. 7V 1200mAh, 4. 44Wh Cavity Diameter: 5cm 1. 97inchs Insertion Depth: 7. 5cm 2. 95 inches (Approx) Using time( Top Speed): 1 hour (Approx)