As for the song I'm currently listening to...
A Real Life by Greek Fire - The link goes to an animated video which is where I first heard the song and I absolutely love the video so go check it out
As for a song inspiring roleplay... sort of. I mostly get inspired pictures wise when it comes to RP but I do have some exceptions and I'll use this song as the example.
Voracity by Myth & Roid (Overlord Season 3 Opening Song)
For context, I have been using a few songs to inspire a Superhero style story. In this world there are of course all sorts of people from Grade 1 to Grade 5. 1's being the lower tier of powers, things that are close to what a peak human can do but nothing too overpowered (Example: They may be able to pull push a fully loaded semi truck down the street after the engine gives out but cannot lift the semi truck over their head and throw it around. Or they can run a mile faster than an Olympian but cannot break the sound barrier running) and 5's essentially being Superman, demigods, world ending supers. They are heavily monitored, with those of higher tiers often times being killed or captured so they do not use their abilities to harm others.
The song above inspired the character of 'Voracity' (Yes I was using the song names as placeholders hush XD) who was going to be a villain of the setting. Essentially she was a psychopathic killer who, as you can guess, enjoyed eating her victims. She had the ability to consume anything and a hunger far beyond what we can understand (or so she says) and as you can guess her favorite food is of course, humans. However at one point in her backstory she had killed this random guy and was beginning to consume him when he just suddenly, was not dead. Yeah turns out he had essentially the super healing factor of characters like Wolverine. As such even though she ate him with all her might he kept coming back which she took less as a problem and more like her birthday and christmas rolled into one. Whenever she thinks back on that time she becomes to aroused it is rather unsettling. Essentially this man became her all you can eat buffet as little by little she tortured him by eating him, with his healing factor seeming to beat her again and again in her attempts to eat him. Eventually though... she won, consuming him fully and well somehow gaining his healing factor.
Yeah as you can guess she was never meant to be used for erotic roleplay aside from the darker rps of course and not for my own use. She was meant to be a villain and one who was made to be an absolute terror as she was psychotic and enjoyed... well enjoying her victims.