[Montgomery gland] It is a small protrusion near the nipple. The areola is dotted with sebaceous glands that secrete sexual pheromones. Each one is small, but by stimulating the protrusions, the sensitivity is concentrated in a swirling manner from the entire areola, leading to a full erection of the nipple. It feels better than continuing to stimulate the nipple directly, Mei Washio's chikubi bump has reached a record high! Please take a look at the appearance of the S1 actress who shakes her big tits and burns herself with new pleasure.