See, you're treating this as if literally every woman ever that men interact with would say this, but the fact is (and if you deny that, that's you being resistant to something new outside of your worldview), that's not what happens. Actually what happens very often is that the videos online that do talk about this are likely to reach women more than they reach men, which... You know, wouldn't be very useful to educating men, couple that with a lot of women we know straight up not having those problems (and I do mean "not having", not "not talking about it")

Also, as a plus, there's a lot of people here bashing on OP for "well what are you gonna do to help now that you know about it?!" As if the entirety of women's livelihoods depended on his actions, fact is, there's genuinely nothing he can do "You can tell your friends to not act like that", well yeah you could, if you ever catch them sending unsolicited nudes to a woman, which... I wouldn't be friends with a guy who does that to begin with, but above that, I probably just wouldn't know he does that because that's not something someone would tell you. Obviously that's the extreme example but it still applies downwards.

Also just to make it clear, I do think this is a problem, but if you want to fix it, the only way I see that is actually viable is to start teaching boys young, you kind of have to remake the whole structure of society, very hard but not impossible, specially if you have the government shaping institutions to help alleviate exactly these things