From the description:
Telling someone how many people you’ve had sex with is a lot like tripping in the middle of a busy sidewalk: People might act like they couldn't care less, but deep down, everyone is judging you. A lot. Sharing "The Number" with someone can be especially awkward when you're dating them. Most people don't get aroused by the thought of their partners having sex with other people.
To the people who do: You do you -- and someone else, probably.
We managed to track down a few couples who managed to avoid this particular conversation until we thrust them in front of a camera and asked if they'd be willing to share the number of people they'd gone all the way with (only we phrased it differently because it isn't 1957).