Catcalling Video Shows These Women's Boyfriends What Happens To Them filmed men's reaction to some of the crass catcalls their girlfriends endured in New York City.
6:07 | 07/30/15

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Transcript for Catcalling Video Shows These Women's Boyfriends What Happens To Them
Many of us have heard them before, catcalls, ugly comments aimed at women in public. Are they harmless? If your answer is yes it's more likely you're a man than a woman. A new social experiment is helping some women show the rest of the world what life is really like in their shoes. And the serious consequences. Here's ABC's Paula ferris. Hey, baby! Reporter: If you're a woman, chances are that at some point you've been catcalled. followed three women on the streets of New York City with undercover cameras then recorded their boyfriends' reactions. I'm not happy with this. Reporter: The reveal missing social experiment has racked up over 2.5 million views and aims to give men a sense of what it's really like when their loved ones are the target of crass and brazen catcalls. That's so messed up. That is disgusting, dude, just get back to work and do your job, don't waste taxpayers' money. Reporter: All three men were shocked at the level of harassment their girlfriends face on a daily basis. What the ? You serious? Reporter: Tessa Hirsch is an actress from Brooklyn and has come to expect those vulgar comments. I get catcalled most days that I walk outside. I feel scared and angry at them, but also just like angry that this is my experience being a woman in this society. Reporter: She's been with her boyfriend, Jonathan Braylock, for a year. There are plenty of men who know that this is wrong and don't want it to be done. I guess there's that -- you don't know what to do. Do I say something? Reporter: For Tessa, the danger is real. There have been times when I have felt absolutely disrespected and unsafe. I've had people who have come up, asked for my number. I've said no. And then they have thrown things at me while I walk away and started cursing at me. I think that men are really surprised that we face this. Because they don't face the same issue when they go walk to the drugstore or go out to run an errand. Why do these people think it's okay to follow this person, make vulgar comments? It's something that no human being should have to go through. Reporter: The cosmo experiment is just the latest video to spark a national conversation about catcalling. Last year, rob bliss creative released this video of shoshada Roberts. For ten hours, she walked the streets with a hidden camera and says she was catcalled over 100 times. That was a typical day. It really was. It's an average. Some days a little less, some days a little more. Hey, lookit there! Reporter: One of our staffers said she heard her first catcall when she was 11 years old and it hasn't stopped since. It makes you feel like you're street meat. It makes you feel like you're being watched. Reporter: With our hidden cameras rolling my colleague, linsey Davis, followed her on the streets of New York City to witness what she endured firsthand. And while some men just looked, this man couldn't help but fall out. Damn ma'am. Excuse me, guys. Reporter: Lindsay decided to confront him and ask why. Did you say, damn, mama, she's got cake? Yes, I did. What made you actually say it? That's often what makes you say -- did you mean for her to be insulted? No. Reporter: Our "Nightline" staffer says it doesn't feel like a compliment. I feel like I'm part of a circ circus. On display for their entertainment. It's a frustrating experiencery I should be able to walk in peace. Reporter: Relationship experts say in order to curtail catcalls, we need to begin with treating this bad behavior much more seriously than we actually do. It is street harassment. Most important thing that we can do is be overly vocal about this. So you want to, one, call it for what it is. You want to call it out. Secondly, you want to make sure that you are reporting what's happening. Reporter: Some women are fighting back, exposing catcallers for what they are. I know you mean it as a compliment but I don't take it as one. Women are accustomed to just say, I don't like it. It makes me feel unsafe but I'm not going to say anything because that's just how it is. Reporter: 28-year-old Lindsay was harass sod much she started secretly filming with her iPhone, reporting herself confronting harassers. We've blurred the faces and changed the voices of the men who Lindsay claims of guilty of street harassment. She own created a website. Cardsagainstharassment. Offering a women a way to calmly confront their harassers. I'm going to give you a card. Reporter: The cards have sayings like. Someone walking, jogging, biking in your line of sight isn't an invitation to comment on the way they look. Next time just say hello. I don't know that I'm changing hearts and minds but if they're being annoying to me I think I'm entitled to be annoying back to them. Reporter: The hope is by showcasing their daily reality it may help stop the cycle of harassment. We don't know who is the safe person and who is the person who's going to follow us home. And they're perpetuating an idea that I don't get to be safe walking on the streets of my city. Reporter: I'm Paula Faris for "Nightline" in New York. How should we handle street harassment? Head to our "Nightline" Facebook page and let us know what you think.

This transcript has been automatically generated and may not be 100% accurate.

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