Well firstly, I didn't say "so what do you expect?" I also don't think it's vile and nasty just for being an explicit song about sex. It's not violent, it's not racist, it's not misogynistic, it's not glorifying criminal behaviour or drug use. People have compared it on this thread to Blurred Lines, but that misses a major point of the critique surrounding that song- most people weren't upset that it was about sex, people were angry that it dismissed the concept of consent.
I didn't specify which Sabrina Carpenter song I was referencing when discussing her explicit lyrics, my mistake, but I wasn't thinking of Please Please Please and instead "Juno," which has the line "I'm so fucking horny" in the bridge in a song mentioning "fuzzy pink handcuffs" and "freaky positions." The comparisons that best fit in my mind are those already mentioned by previous posters, songs like My Neck, My Back or WAP. I'm not sure "who the fuck," as you say, wants to hear these sorts of lyrics, but they must exist! Because artists keep writing and producing such songs, and people keep listening! Hell, even Mozart wrote a piece called Lech mich im Arsch- it's not too hard to figure out what that one means in English.
I think adult music has its place. I think explicit music about sex has its place. That place isn't in my playlists, or on the radio, but on a streaming service which acts as a catalogue for pretty much any song under the sun? Yeah, fair enough. As I said, it's marked and warned, anyone with explicit content blocked won't come across it by chance.
And, once again, Bruno Mars, along with every other artist, is allowed to write songs for different demographics! He's mainstream, yes, but his music has always been aimed at adults even if children enjoy some of the hits. Unless people think singing about cocaine, making love "like gorillas" and having sex so loud that "the neighbours call the cops" was family friendly- he's been writing explicit music since at least 2012! This one won't be uncensored on the pre-watershed radio, or Now! That's What I Call Music, or anywhere else explicit music is specifically excluded. Those spaces should remain safe and family friendly, and such spaces should continue to be created and maintained, but that doesn't mean people shouldn't be able to make and access art outside of that.
This song may not be my cup of tea, or yours, but judging by the amount of views and streams it must appeal to some people and those people have as much right to hear it as the musicians have to make it.