Personally, I find the tag #nsfw cringeworthy when used for art and artistic photography. You get lumped in with pornography, and this is beautiful and not the least bit pornographic.
........"not safe for work" - strange definition, it is certainly safe for where I work. It all depends where one works, perhaps. If one is working for a Saudi-Arabian Kindergarten, then perhaps - in which case you would be required to put at least a paper bag over your head. I am being facetious. Thinking about how Rome had to cover up statues for the Iranian president's visit.
But I know where you come from. I lived for decades in the Canadian bible belt, no less bigoted and ultra-conservative than their American counterparts.