All Research

Married Americans have sex about 56 times a year, and 49% of married adults have sex weekly. Learn how frequency changes with age.

About 4% of the top million websites were porn, not the 30% often quoted. Here’s porn’s real share of searches, traffic and web pages.

58.8% of US women have faked an orgasm at least once, and men fake it too. Find out why people fake it and how many have since stopped.

Penetrative sex lasts a median 5.4 minutes in a stopwatch study of 500 couples. Here’s how age, foreplay and orgasm fit in.

69.4% of male porn performers in a survey used erectile aids, and editing and breaks help too. Here’s how porn sex compares with real sex.

17.8% of US men and 10.3% of US women have had a threesome. Explore fantasy vs reality, FFM vs MMF and how threesomes turn out.

Porn viewing time explained 0.9% of the variation in erection scores in 3,267 mostly young men. Find out why problematic use matters more.

20.7% of straight men in an online US survey had watched male-male porn in the past 6 months. Learn why, and what it says about orientation.

57% of young adults in Australia say they’ve been choked during sex. Learn why people do it, porn’s role and the health risks.

The average erect penis is 5.17 inches (13.12 cm) long. Here’s how size varies by percentile and region, plus porn vs reality.