We all occasionally make choices in life that require being weighed. Choices that have no "right" answer, but rather a "best" answer depending on the values and beliefs of the individual. That was the case here when these women were presented with an opportunity to raise $20 for breast cancer research and awareness by allowing a youtube guy to motorboat their breasts. Some women undoubtedly said "no thanks", because they found it to be too sexually exploitative, rude, distasteful, embarrassing, or whatever their personal rationale was...but we're unsure how many women said no because that footage wasn't shown. The women who said "yes" ran the pros and cons quickly through their thought process before determining that overall it was worth going through with the motorboat for a $20 donation.
For those that said "no thanks" we should respect their decision. For those girls who agreed to being motorboated, it would be rude and presumptuous to assume they weren't capable of making a decision by assuming these guys coerced them to consent using the facade of a noble cause. These girls weren't drunk from what I could tell, so they were in a proper state of mind to make their own dang decisions. As such, if what was being requested didn't cross their personal line of decency, then they consented.
Are they guaranteed to never regret it? Of course not, some of those girls may regret a tattoo they got, but on the flip side some girls who said "no thanks" may have watched the video and thought "aw man I wish now that I had participated to get that running total higher". It can go both ways!