Transcript for Bride's 'Purity Certificate' Stirs Up Premarital Sex Debate
The young woman you're about to meet is proud to prove to her father she kept her promise to stay a virgin until her wedding day. So proud, in fact, she presented him with a serf purity signed by a doctor. Then a photo of her big moment went viral, igniting a firestorm of criticism. Here's my "Nightline" coanchor juju Chang. Reporter: We've all heard of purity balls where young girls promise their dads they'll remain virgins till marriage. 22-year-old brieland bowman took it one step further. I have a special presentation -- Reporter: Surprising her father, a pastor, with a framed serf purity. I am really excited. Because I went to the doctors. And I got checked out. And my hymen is still intact. Reporter: Showcasing her chastity in front of her 600 wedding guests. I really wanted to prove to him at another level, dad, your word is good and my word is good and we did it. For her to be able to accolish something, especially in this society where it is so sexually driven, it was an exciting moment. Reporter: The document signed by brieland and her doctor Reading in part, to show how I have honored god and my earthly father in my body by maintaining my purity." Even though it was something presented to her, it was still her choice to decide to sign it. It wasn't like it was something that she was forced or made to do. Reporter: Her husband, 28-year-old Tim bowman, says he was also a virgin until marriage. Just to say that I was the first person to be with her and vice versa, I think it's just something that's special. Reporter: When he takes to the Mike about his purity, a slightly different reaction. I was worried about seeing there was no way they could verify -- there was no test they could run on me. You got to take my word for it. Take to it the bank. There's a double standard here. He talked about his virginity and everyone laughed wit. Right? It was really unimportant. Whereas women's virginity, it really gets very deeply wrapped up in whether or not we think that young women have value. Reporter: The couple who dated for three years admits it wasn't always easy. I've dated people and got in situations where I've come close to not doing what I said I was going to do -- I don't want to hear that. I don't want to hear that. Reporter: The newlyweds honeymooning in dubai when brieland's online posts about that purity certificate went viral. Our phones blew up. Whoop whoop whoop whoop whoop! We looked at each other. Some of the stuff was seemingly nasty. Very nasty. Reporter: Thousands commenting. One writing, why on Earth is she presenting such a certificate to her father? Another saying, how sexist is it that we're giving women away to their husbands as some sort of prize? Where is his certificate? The idea that the most valuable thing a woman has is whether or not she's engaged in any particular sex act is insulting and dehumanizing for women, when we scratch the surface of it. Reporter: Brieland's husband says the negativity didn't shake their faith. To see people support and people have issues with it I think is an empowering thing. It's getting the conversation started. Reporter: It's not just public ceremonies pushing celibacy, sometimes it's public personas. Nick Jonas was famously chained to his purity ring. ? You got me in chains ? Reporter: But it didn't work out. Confessing all to Wendy Williams. Nick? Yes? Are you still a virgin? No. Okay. Just asking. Just to be clear. Taking off the ring could mean you're not a virgin or you're contemplating. No, I'm an adult in all ways, comfortable with who I am. Reporter: Selena Gomez ditched her purity ring. And long before the wrecking ball, Mylie Cyrus had a chastity promise. I hope young people who are paying attention learn the right lesson which is that these abstinence pledges do not keep anyone from having sex, right? These celebrities put them on, then when they feel like having sex, they take them off. Reporter: According to one study chastity pledges are just as likely to have premarital sex as nonpledge is where they do have sex they are less likely to use protection and birth control methods. This is just a reminder, keeping yourself pure is important. Reporter: Last year "Nightline" visited Caroline Johnson just before her very own purity ball. One of the things that you were talking to daddy about was when am I going to get my purity ring? And one of the things that I think's important for us to remember is this is your desire to do it the lord's way, to really save yourself from kissing lots of toads along the way and wait for your prince charming to come along. So weep that on your finger and it's a daily reminder that at this point you're married to the lord. And your father is your boyfriend. Reporter: Pledging to her father to not even kiss until her wedding day. Get ready to dance the night away. Fathers, stand with me. Will you stand together in this accord? Reporter: 60 like-minded fathers pledging to protect their daughters' vows. What I hear from young ladies is, there's this need for that physical touch. And from a male being. That's what I believe the father role is. Let's take those covenants in the middle of your table. I choose before god to cover my daughter as her authority and protection in the area of purity. There's a pen in the middle of your paper, pick that up and sign that. Then have your daughters witness that. Reporter: It's an event to remember. A public declaration of chastity. These very public rituals, it's a way of evangelizing, a way of saying, this is the standard we should all adhere to. It's a way of trying to make it a cultural standard. The trouble with that is, there's no one size fits all approach to sex. Reporter: As for the bowmans? I couldn't be any more happy, more proud. My wife is amazing. Reporter: They have one more public declaration. We're not virgin anymore. Reporter: For "Nightline" I'm juju Chang in New York.
This transcript has been automatically generated and may not be 100% accurate.