Montgomery glands are small protrusions surrounding the nipple that secrete sexual pheromones through sebaceous glands. Scattered across the areola, these tiny structures heighten sensitivity throughout the entire area when stimulated, leading to an intensely sensitive nipple state. Stimulation of this region feels even more pleasurable than direct nipple contact, driving S1 actress Mei Washio's nipples to unprecedented levels of arousal. Watch as she, a big-titted S1 beauty, sways her large breasts and becomes overwhelmed by this new, intense pleasure.