Have you talked to Torvusil about this? He's another big tag guru from Derpibooru and an old Reddit art mod.
I noticed he rated some of your @`safe@` tagged above things as @`suggestive@`, so you'll also want to chat to him about piss ratings. Because chances are he'll also correct anything "piss" to "suggestive" or higher in the future.
I doubt he has that much differing opinions about this than me, but I would appreciate his input as I would consider him an expert on this matter given how much artwork classification the guy goes through every day.