If you ever find yourself in that time old situation when you're alone with a girl and you can't decide whether or not it's the right time to go for it. You take baby steps, look for IOIs, but at the end of the day, you still have no clue where her head is at?
Here's your secret.
Look at her body language. Is she animated or still?
Is she a little anxious or is she calm?
Is she chatty, or has she gone quiet?
If you're cuddled up on a couch getting your Netflix and chill on, is she moving around or is she dead still?
And most importantly, who is more anxious - her, or you?
What I'm describing is sexual tension and the effect it has on people. Now here's a little secret. In my experience, every time a girl has already made the decision that she's DTF, she's all energy. She can barely sit still, and often very sexually aggressive. And everytime I've been in a sexually tense situation with a girl and she's all poker-faced? Crash and burn bro.
The reason why is sexual tension, which is a product of attraction. If she's feeling it, escalation is likely a safe bet. If she's not, probably not. And if you are and she isn't, it's a trap!
Seriously, that is the secret to knowing when to physically escalate on a girl. Look at the energy levels of the two of you, and especially if there's any disparity.
The most important reason is because girls aren't stupid. They're more aware than you are, when they're in a situation with a guy where he might try to make a move. She's almost always expecting it, even if she says otherwise. If she wants it, she'll be trying to contain her excitement. And the more unsure or resistant she is, the colder and more remote she'll get. And if she really isn't feeling any sexual tension, she'll be totally normal, neither guarded nor excited. This is especially important if you're dealing with women who are already in your life like friends/coworkers/classmates. Because you know each other, rapport is much higher and that tends to confuse things. But the rule still holds true, if she's excited, go for it. If she's just sitting there, not giving off any signs, don't.
there doesn't seem to be anything here