I am not an admin, but the general advice here is "if you are not sure it is OK to post, then don't post it" so you started well.
More specifically, looking at the Rules of Posting (linked at the top of every forum): "Excessive profanity" is listed as "please don't" and "Explicit sexuality" is listed a an "Inappropriate Topic".
Given that so-called "mature" humor usually involves one of those two, I would recommend not posting them.
That said, I did like some of your jokes, especially the secluded frog!