Definition of "coitus" [coitus]

• Sexual union between a male and a female involving insertion of the penis into the vagina. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "After marriage we practised all sorts of fancy coitus, _coitus reservatus_, etc., and rarely passed twenty-four hours without two conjunctions, until she got far on in the family way, and our play had to cease for a while."
• "Innocent marital coitus is transformed into 80s amateur porn, hot dogs get upgraded into lobster tails, nights out to dinner evolve into gut-busting flesh carnivals, and low-speed family cruises on the lake turn into high-speed water-skiing trials."
• "One should never engage in coitus, he writes, if they are "phlegmatic, nor if they are replete with wine or drunk; nor when they emerge from the bath, nor if they have diarrhea, nor after a bleeding, nor after hard work.""