It is always unsolicited until it is reasonably, directly solicited
And what does directly even mean in this context? The standards for initiating sex don't require a sit down conversation as to what each party is agreeing to. So why should nude sending be held to a different standard?
"The standards for initiating sex don't require a sit down conversation as to what each party is agreeing to."
This attitude leads to women having sex/relations they aren't super comfortable doing. It's not a mood killer if you take a beat just to make sure you're on the same page with expectations and it takes a lot less time than locating, opening, and putting on a condom.
You stated in a different comment that your gf tells you off and it kills the mood if you ask to move to the bedroom or having sex while impaired, but surely you realize that's a totally different situation than you meeting up with someone from a dating app, right? Spontaneously acting with someone you know and with who you have built trust is waaaaaay different than sending an unsolicited nude or making advances on someone who is a little more than a stranger.
She tells me off if I suggest going to bed to have sex because it kills the mood. So what? Am I to give up sex because our views on consent don't match up with your views?
Have you ever actually been in a relationship? Or do you just have an aversion to sponteniety?