Everybody's doing it, and by "it" we mean sex.
Except these celebrities who were virgins until marriage, or who are still holding out for that magical moment.
Bet you didn't know about some of them ...
Carrie Underwood told Slate magazine in 2007 that she was saving herself until marriage. She did just that, until Mike Fisher put a ring on it and they exchanged vows.
"I'm not trying to preach consequences here, but I think when you say no, down the line, it will be a better decision." - Julianne Hough, actress and Dancing with the Stars pro
Jordin Sparks is still saving herself for marriage, she says, even if photos of herself with former fiance Jason Derulo in bed called that into question.
While his brothers may have eaten the forbidden fruit, Kevin Jonas was a virgin until marrying his wife, Danielle.
Former football standout and devout Christian Tim Tebow is quite open and quite famously known for his proclamations that he's a virgin.
Hilary Duff was a virgin until marrying Mike Comrie. The two separated in early 2014, and again in 2015, so we wonder how she feels about the single life right now.
Sean Lowe and Catherine Giudici
Oh, they're all smiles now, because they did the deed on their wedding night. The Bachelor star Sean Lowe vowed to wait until marriage for sex and Catherine Giudici honored his desires.
Jase and Missy Robertson
Jase and Missy Robertson of Duck Dynasty fame were both virgins on their wedding night. As Jase said of his lack of prior experience on the A&E reality show ... he has three kids. He figured it out.
Tina Fey waited until 2001, when she married composer Jeff Richmond the age of 24 (they're still married). Though in typical Tina fashion, she jokes that she simply "couldn't give it away."
Olympic track star Lolo Jones has vowed not to have sex until she's married and calls holding out harder than training for the Olympics.
Jessica Simpson was a virgin until marrying Nick Lachey in 2007. Supposedly. She then had two kids with Eric Johnson before they got hitched, so clearly once around the celibacy block was quite enough.
Supermodel Adriana Lima oozes sex appeal and she did it even while saving herself for marriage. We all want what we can't have, right?
Is it prophetic that Sarah Drew continues to play TV and film characters who have saved or are saving themselves for marriage?
Kirk Cameron became a born-again Christian while filming Growing Pains and remained a virgin until marrying his wife at age 20.
After giving birth to Justin Bieber, Pattie Mallette vowed to remain a virgin until she married. She's still single and he's ... Justin Bieber.
Bethany Hamilton, who survived a shark attack and went on to be a star surfer, earned her white dress by saving herself until the big day.
Tamera & Tia Mowry
Tamera Mowry, Sister, Sister star, was a virgin until she married Adam Housley. Her sister Tia took that same pledge!
Selena Gomez claimed she was going to abstain from having sex. Then Justin Bieber came along. J.B. remarked at one point that he knew she was in love with him because she gave him her virginity. What a d--k for kissing (lovemaking) and telling. In any case, she has vowed to remain a "born-again" virgin until marriage once more. Stay tuned.
Former View co-host Sherri Shepherd waited until she was married to lose her virginity. She has been married twice - to Jeff Tarpley in 2001, when she was 34, and then to Lamar Sally in 2011.
Taylor Lautner was very vocal about - and made a YouTube video pertaining to - his desire to practice abstinence. Whether that desire gave way to other desires is unclear, however.
Leelee Sobieski became famous when she was a teenager, yet still remained chaste until 26, when she married fashion designer Adam Kimmel.
It has been reported that Mariah Carey didn't lose her virginity until married Tommy Mattola at 23, but even more amazing are reports that she waited until she married Nick Cannon to have sex with him … of course, they only dated for two months prior to tying the knot. Makes sense.
Jill, Jana, Jessa and Jinger Duggar
You could put any of the Duggars in here really, but adults Jill, Jana, Jessa and Jinger Duggar have talked the talk and walked the walk. Jill and Jessa got married in 2014 (and got pregnant soon after) while Jana and Jinger are still waiting for The One.