Mammary intercourse involves the male placing his erect penis in the female's cleavage, then start rubbing or thrusting between her breasts, while the breasts are squeezed around the penile shaft, creating a tight area for stimulation. In addition, the woman may move her breasts up and down against the penis for an additional stimulation. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. When performed as a non-penetrative sex act, the act is continued until the point of ejaculation for the man.
Mammary intercourse is known as titty-fucking, titfuck, titjob or boob job in the United States, as well as tit wank or French fuck in the United Kingdom.
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