i haven’t had anyone accidentally see pics on my phone per se, but I do love noting the “tell” - if someone angles their phone when they’re looking for something to show you then they definitely have nudes lol. There’s something kind of inherently hot about that, not seeing it, but realizing someone you know definitely has nudes.
I did have a friend accidentally send me a dick pic once. We were texting back and forth trying to pick a restaurant to meet at for lunch, and it turns out he was simultaneously sexting with his girlfriend. In the middle of our “do you feel like Thai or Mexican?” exchange boom - I get a pic of him naked with a hard on. Immediately followed by a mortified phone call where he kept saying “oh my god I’m so sorry” over and over. I tried to put him at ease, but it did lead to some very funny double entendres during lunch. Plus it was fun to watch him blush. I did let him know he has a great dick, which didn’t help lol.
I did show an article to a straight friend on my phone while we were getting drinks recently and while we were looking at it I got a Grindr notification from some guy whose handle indicated he’s a hung top saying something like “let me breed that hole.” And I was like “um” and my friend said “can you wait until I finish my beer first?” Lol