A new trend has spread across the New York subway system – men using iPhone AirDrop to send unsuspecting passengers in the same train car a picture of their crotch. Dick pics in general have become an increasingly popular fad, especially for millennials, as illustrated by new data from YouGov Omnibus.

In fact, 1 in 4 millennial men (27%) have sent a dick pic to a woman. Of millennial men who have sent a lewd photo, 24% have done so without being asked. However, not all dick pics are unsolicited – 34% of millennial men have been asked by a woman to send one.

Given the prevalence of these provocative snapshots, it tracks that just over half of millennial women (53%) have received one. Specifically, a staggeringly high number of these respondents have been messaged an uninvited graphic image – roughly 3 in 4 millennial women (78%). Actually, more young women responded that they’d received an unwanted dick pic than had received one because they asked for it (69%).