A large UK poll commissioned in the wake of the Harvey Weinstein scandal has revealed shifting trends as to how women construe sexual harassment. For example, 60% of young British women would consider a man looking at their breasts to constitute harassment. Although there are differences between older and younger women, with older women typically less likely to define sexual harassment so broadly, it seems there is surprising agreement in the views of male and women, although in the case of looking at breasts, the gender divide was quite significant.
https://yougov.co.uk/news/2017/11/01/sexual-harassment-how-genders-and-generations-see-/
Ironically, showbiz magazines were reporting prior to the Weinstein scandal on the trend for plunging necklines amongst Hollywood starlets.
http://www.instyle.com/awards-events/red-carpet/golden-globes/plunging-necklines-fashion-trend