It’s a sex calculator. Now remember back in health class your teacher told you every time you have unprotected sex you’re actually having sex with all the people they’ve had sex with? Ick. Maybe this isn’t something you really want to know but it’s part of Sexual Health Week, an annual event in the U.K. coordinated by the U.K.’s Family Planning Association.
How it works is you enter the number of partners, gender, age etc and based on that data, the site calculates approximately how many sex partners your partners have had.
Interested in checking it out? Here is the link.