Bra cameras would be an interesting accessory for any woman to have, and, as one woman documented, they offer a fascinating look at just how many people–of both sexes–peek and judge when a woman is showing off some cleavage.

The camera was used for a Nestle campaign in the name of Breast Cancer Awareness Month, and involved a woman wearing it under a hoodie to catch unwitting strangers in the act of checking her out. In fact, that plays into the slogan for the campaign, which pops up at the end of the video.

“Your breasts are checked out every day. So, when was the last time you checked your own? #CheckYourSelfie.”

The video has racked up close to 2 million views on YouTube after it went viral; Eloise Oliver, the woman wearing the bra, says it was an odd experiment at first, but she quickly got used to the attention.

“It took me a little while to get used to it, but after a while I think I mastered angling slightly my boobs towards people,” she said.

The bra has an on/off switch and captured one day in Oliver’s life as she walked around in public and rode the subway; about 30 people were busted “checking her out”. More importantly, it’s raising awareness for a good cause, and the video will get people talking about self-checks.

“It’s so important for everyone whether you be male or female to make sure that your breasts are checked,” Oliver said.