Uh-oh, now I've been "called out." Look, you apparently don't even understand the nature or meaning of the meme you posted, which is, indeed, of a purely sexual nature, not to mention being crude, tasteless, and reeks of a gutter "humor" nature. It's not a matter of interpretation. If you're still unconvinced, merely doing a two-minute Google search should help clear things up for you.
As to the other posts you mentioned, even though I personally made no such posts, with the possible exception of perhaps not being "good," which is most definitely open to interpretation, I do not see where or how they explicitly contradict the topic of this thread, particularly what I consider the primary request to keep it "clean." That said, to quote someone in this very thread, apparently it's "YOU [who find them] offensive."