The trend of men ejaculating onto women has become a hot topic in Korea, where advocates want to see it defined as a sex crime. But these sort of attacks may also be dramatically underreported in the U.S.

“With sexual assaults, [experts] often say the person to whom a victim first reports can have an impact on whether the victim proceeds with the process. So, if you can imagine telling a friend or family member or loved ones about a semen attack, only for it to be minimized as, ‘Thank God you weren’t raped.’ Or it might be law enforcement saying ‘Well, what do you want us to do? Our laws don’t cover that,’” [Jennifer] Long says.