“Don’t text back if she left you on read” is BS.

Well in some cases.

For example, let’s say you were vibing with a new girl on text and later say something too sexually overt or that really offended her

That turns her off. It was too much for her.

And then she leaves you on read. Calls you a fuckboy and says she wants nothing to do with you. Says her standards won’t allow you.

Wait about a week. See if she texts you back. If she doesn’t, it’s perfectly fine to double text and say, “hey, how was your week been?” after you gave her some time and space

This is one implementation of the concept of plausible deniability. Of course don’t ever reinitiate the conversation with something sexual again. She’ll prolly block you

But a simple, “how has your week been?”. She’s going to justify to herself saying. He’s just asking how I am. And there’s nothing wrong with responding to this. (There’s good chance she will respond if you vibed well)

Even if she promised that she doesn’t want anything to do with you again. She may respond because she identifies being as polite.

Or shit happens in peoples lives. Maybe she’s bored, sad, lonely, forgives you, etc.Thinks change day to day. And you never know