Just something to consider, there's a reason most communities are divided up by topic. r/UrineWords (run by the r/Pee mods) is specifically for discussions and stories, for example, and has well-organized flairs to categorize them all; that one's pretty small, by the way, they could probably use some help with promotion if you're looking to help out somewhere. It's almost always much more useful to help grow an existing community rather than try to create more duplicates.

For pics/vids, there are literally hundreds of topic-specific places, including our own r/Pissing, and if you follow the related links far enough they get really specific, many of them like r/PeeDesperation also having category flairs. PeePersonals is focused on meet-ups and has a location search flair function (and allows users to include pics in their posts), DirtyPeePals is more online-focused and is rolling out activity-specific flairs for friends/penpals/roleplays (and also allows inline pics); we could also use some feedback about what those flairs should be, if you'd like to help out there.

If you search Reddit, you will find no shortage of other communities doing just what you propose, but look at them from the perspective of a user, and a problem becomes readily apparent: how do you find anything in a community that has no specific focus? If you're looking for content, you'll have to sift thru a lot of personals ads that just post the same thing every couple days as they re-up their post (which is why every single non-personals subs has a rule against these). If you're looking for stories, most text posts will also be personals or discussions. If you're looking for friends, you'll tend to find that most posts claiming to be personals are just sellers advertising their content for-pay, and without a specific community focus, it's virtually impossible to weed those out.