Pleasure Tunnel Anus - for the Autoblow A.I. The pleasure tunnel with anal opening is made from a skin-like material that feels ultra-realistic, adapts to any penis size, and wraps around your best piece in a comfortable and snug manner. This sleeve is a pleasurable addition to the Autoblow A.I. masturbator. The casing is made from soft silicone material and has been specifically designed for the Autoblow A.I. With this gadget, you will never have to miss out on anal sex again, whether you are solo or your partner simply doesn't share your preference. Our recommendation: Before indulging in the delightful sensation of masturbation, apply as much lubricant as desired to the opening of the sleeve and the penis, and enjoy exciting anal sex.