Psychologists have researched this. Please read the entirety of my post as if I had qualified every statement with "it appears... A tendency.... the evidence supports... A trend that...". I cba to type it out every time.
Women and men both have very high standards for long term partners: they want nice reliable funny people they find attractive. (Although blokes are more prepared to put up with bad personality if the woman is stunning)
Women still have high standards for short term partners - we don't want to have one night stands with ugly dickheads.
Men, however, are much more prepared to drop their standards for a one night stand.
One of the biggest, and most reliable sex differences in psychology is willingness to have sex with a stranger. Around the world, a maximum of about 4% of women ever initiated that they would shag a totally hot stranger. In men, there had been more variability between studies, but anywhere from 40% to 85% would totally go for it.**
**These studies feature a conventionally attractive, unembarrassable volunteer who goes up to individuals on their own in public places, and says "I would never normally do this, but I'm incredibly attracted to you. Would you come to my hotel room tonight?" then reports the response to the researchers.