Skip to main content

sperm competition reaction 

n.

A theory that explains why the presence of a second male in a sexual scenario with a woman increases rather than decreases the arousal of a heterosexual male.

The presence of a second male causes the first male's testes to increase sperm and testosterone production. This evolutionary reaction occurs so that if they both engage in intercourse with her, his increased erection size and sperm count will boost his chances of inseminating her over his reproductive competition.

Although the reaction is most powerful in person when a second male's pheromones are present, just seeing another male's erect phallus through any type of media will trigger the reaction.

When the other male ejaculates, the first male's reaction surges, giving him an overwhelming urge to also ejaculate even if his penis is nowhere near a vagina or other orifice.
When I saw my wife's boyfriend emptying his balls inside her womb, my sperm competition reaction became too much and I dribbled my cream inside my pants.
Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.
More from Urban Dictionary
A US deep south term for an alligator. Usually used in the Cajun dialect.
Take the big pirogue, I saw a huge swamp dog out there earlier.
swamp dog by Crystal Ambrose May 22, 2006
Word of the Day on October 12, 2026

Throat Sweats 

The feeling and build up in your mouth/throat of saliva that sometimes accompanies nausea.
Oh man those burritos gave me the throat sweats, I hope I don’t have food poisoning.
Throat Sweats by TacoFings420 April 23, 2024
Word of the Day on October 11, 2026
Being ignored by someone when making a statement or asking a question. Also known as blanked and turfed.
Person 1: Did u watch ** last nite?
Person 2:......
Person 3: O no u got aired!
aired by Pietro February 9, 2005
Word of the Day on October 10, 2026

piddlefart

Instead of doing my homework, I decided to piddlefart around for two hours.
piddlefart by Rene April 25, 2005
Word of the Day on October 9, 2026
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
Load more