Okay I'll play.
Well how explicit are we talking and how much of these scenes are in the story? If this is a case of you writing straight up porn, yeah it's most likely going to get taken down regardless of the warnings.
However, we just had someone that claimed they were writing porn and the actual content wasn't even as graphic as some of the other stuff on here. (Though they kept making sock puppets and spamming the site, so they got nuked anyway) so what your idea of explicit vs what someone else thinks is an explicit sex scene might differ considerably.
This is also going to depend on how well written the story is in general. If you're writing some epic scifi story with exterminating bug monsters, blowing up worlds and the protagonist just happens to fuck some purple skinned alien chick in between all that, well that ONE scene is probably going to get a pass.
If you're writing Henry's Hentai Super Funtime Adventure, where you're just writing mechanical descriptions of sex scenes and got bodily fluids leaking all over everyone, then yeah it's going to get axed.
In any case, if you're just going to roll the dice and write this and see what happens, crank up the maturity level to 7 and slap an extra warning on the front page.