Figures released to promote awareness of sexual health say that the average British man or woman has slept with 2.8 million people - albeit indirectly.
A British pharmacy chain has launched an online calculator which helps you work out how many partners you have had, in the sense of exposure to risk of sexually transmitted diseases (STIs).
The "Sex Degrees of Separation" ready reckoner tots up the numbers based on your number of partners, then their previous partners, and their former lovers, and so on for six "generations" of partners.
"When we sleep with someone, we are, in effect, not only sleeping with them, but also their previous partners and their partners' previous partners, and so on," said Clare Kerr, head of sexual health at Lloydspharmacy.
"It's important that people understand how exposed they are to STIs and take appropriate precautions including using condoms and getting themselves checked out where appropriate."