Most girl's don't particularly like being asked for nudes.
Yep, many would take a "you're beautiful" or a "how's your day?" over whipping off their clothes, posing in an awkward, "sexy" position, snapping a selfie and shooting it into your DMs so you can share their naked body with your mates... Or get some material for your fapfest.
If this is news to you, you need to take a good long look at yourself. It's 2018, it's time to wake up mate.
If a chick want to send you nakey pictures that's her own preogative, but asking for them off the bat, well, mate you probably sound like a creep.
Speaking of, this chick's response to a creeper requesting nudes is absolutely outstanding....