>>12837692Reddit is pretty big and has lots of weird people. If you look deep enough, you'll find that there's people who have all sorts of unusual fetishes, so I wouldn't be surprised if many of them are into young men too.
They're probably not very good for making friends with, though.
If it's just a one time deal, you can send 2-3 private messages, make the trade, and pull out immediately afterwards.
You could try to catch the spider with a small box (like one of those candy boxes).
If catching spiders doesn't work, you could always try cumming on dolls instead.