I’ve gotten some on Discord. Men don’t send unsolicited dick pics to show off, they show them to harass. I only get them from people I’m not paying attention to. Like if someone messages me and I stop messaging back that’s typically when I get them. You can’t fathom doing it because you’re (hopefully lol) not someone who would sexually harass people. They don’t feel shame for doing it. To them, getting any sort of reaction to it is the goal. Telling them “you’re disgusting” would be giving them attention and something they want.

PSA: When you get unsolicited dick pics, block and report. Don’t respond. Don’t reward their behavior. If you’d like to go on some crusade to tell their mother (I’ve seen some people do that lol) that’s another topic, but never reply to them directly by saying anything.

It sounds like my experience is a little different from this woman’s though, I typically get them after I stop answering. I haven’t ever gotten one in the first message. But the “uh, hello??” part tracks with what I’ve seen. It’s attention seeking behavior.