You may notice that a part of your breast feels different from the rest, being less "squishy" and more "dense". This can be a normal part of menstruation or breastfeeding. The thickening can be in the skin which is a sign of Inflammatory Breast Cancer or deeper in the breast. This thickening is caused when cancer cells are blocking circulation in the breast via blood or lymph vessels or a tumor is growing near the surface of the skin. This is different from a hard lump, which is caused by cancer cells that grow very close together.
Mammary intercourse is a sex act , performed as either foreplay or as non-penetrative sex , that involves the stimulation of a man's penis by a woman's breasts and vice versa. It may be used as an alternative to a handjob. Mammary intercourse involves a man kneeling or sitting on a woman's stomach or chest and placing his erect penis between her breasts, and rubbing or thrusting it there, while the breasts are squeezed around the penile shaft, by either the woman or the man, creating tightness similar to masturbation , [1] and in simulation of penetrative sex. To create a smooth motion, a lubricant , masturbation cream , or saliva may be spread between the breasts or on the penis. In one variant, the woman can tighten her breasts around the penis and move them up and down to bring the man to orgasm.