The phrase "act of coitus" is correct and usable in written English.
It can be used in contexts discussing sexual activity, reproduction, or related topics in a formal or clinical manner.
Example: "The act of coitus is a natural biological process that plays a crucial role in human reproduction."
Alternatives: "sexual intercourse" or "act of sexual relations".
Fear of being impotent frequently causes impotence, and, in many cases, the afflicted male is simply caught up in a self-perpetuating problem that can be solved only by achieving a successful act of coitus.
He knows this erotic escapade will end like all his others: with "the damp defeat of two exhausted bodies on the mattress" after an act of coitus that has all "the limp joy of two strands of spaghetti entwining".
Results: Symptoms began with the first act of coitus in 20.4% of patients.
He plays with the Christian idea of God as a Trinity to depict a trinity of woman-man-God in the moment of lovemaking; and reworks the account of the creation of Adam in Genesis to describe the act of coitus itself.
Reading modern sex scenes, you'd think that every act of coitus was some laboratory-sterilized, function of biological necessity rather than two drunks rutting on a lopsided pool table during "half-priced shoes night" at the Bowl-a-rama.
The effectiveness of the 12 h regimen dropped significantly when there were further acts of coitus after treatment which was not observed in the 24 h group.
This act of atomic coitus created a mass sufficient to produce a critical reaction.
Act of first coitus following total hysterectomy has been a commonly identified inciting event for vaginal cuff dehiscence [4, 5, 8, 10, 11].
A stuffed marmot "looks as though he's been caught in the act of rear-entry coitus"; Peaches' mother is "not the fleshy Mother Hubbard type" but a "small, hard, sun-baked little woman you could crack walnuts on".
The coagulate is formed within about a minute of coitus, acts in a similar way to a cervical plug (Harper, 1994) and is then enzymatically degraded (Lilja and Lundwall, 1992).
There's crossover, AU, Hentai, OoC, Uber, Mary Sue, slash fic, hate fic, anti fic and even wing fic (in which familiar characters sprout wings and discover their new beauty through acts of mid-air coitus).
