I may be reading this incorrectly but I do not understand what you've written.
I'll recap for thedude.
You posted a thread with the title "Here's a non nudity site that some may find interesting", with a link to said site.
thedudeabides posted a link to a different non nudity site that some may find interesting in the thread that you started.
You questioned why he posted.
He replied with the reason why he posted (ie. it was on topic) and wondered if you had questioned his post because only you are allowed to post such things.