You might ask if you may go further, or you gently make a move and see how the other person responds. This seems like a matter of common sense to me.
a) gently make a move - doesn't strike me as common sense, but I surely get what you're conveying
b) going in any direction such as "further" strikes me as a bit odd that we allow it to occur without explicit consent; that we do is very fortunate
c) kissing with eyes closed kinda makes it hard to see how the other person responds, but not impossible
d) more common (sense) is you can't do this with just anybody without a whole lot of explicit consent and so (restating b) that ability to leap beyond what is otherwise a significant boundary, is amazing.
e) I find the knowing that it will be okay = fascinating. Nearly miraculous.
f) If not finding the knowing, fascinating, I'm still curious what makes anyone think it is okay? Especially at the nuanced level of whatever is the next move to go further. Like pinching a nipple hard, probably not so good, but not entirely out of the ball park. (smiles) To contemplate that it could be okay is humorous, and yet that could occur and it could be "perfectly okay." But more likely, people are generally doing more gentle moves and all of that exploring, all (for the most part) perfectly okay. I guess part of me appreciates our willingness to take that for granted.
g) g wants to say that I truly enjoy a mild dash of schizophrenia. We all do.