No - is not the start of a negotiation. It is a complete sentence, and does not mean 'convince me'. If ANY woman is NOT allowed sexual/romantic boundaries, then it very much is rape culture. That is what rape culture actually means.
Reposting this too, as this ^^ is what this protest is about. This is why so many people have issues with the trans ideology that demands submission to their beliefs without challenge because it enables the above to flourish if no one is allowed to say no. And those lesbians are saying no, loudly, clearly, and unequivocally. And I support them 100%.