Ultimately it is about having everyone's 'No' on any level respected ( as well as the ability to give such a 'no'). No, you don't get my time if I don't also agree to talking to you and you don't get to demand it either, or stall me coz you feel entitled to my answers (both genders!), no, I don't want you to touch me there, no I do not want to hear what you want to do to me and no I do not want to give you my phone number or tell you that I have a boy/girlfriend before you leave me alone.
Let's play the 'No means yes' games only with people we know well enough to be sure of that meaning; where consent was given earlier and a good enough rapport has been established to actually gauge this stuff properly. If s/he seems ambiguous, leave your 'offer' on the table and give them time to mull it over - they'll come and get you if they want you to continue. There is nothing quite like someone who can walk the line between being completely honest and forward about his wants yet utterly respectful and attentive to the other person's needs - such as time and space to get on the same page or decline politely.
The terror that one experiences from knowing that you cannot stop anything that will happen next - and not knowing what that will be - and the trauma that leaves afterwards is what we're trying to address here, after all.