No means no. Its a pretty obvious and clear concept, right? Well, the lifetime experience of at least 1 in 3 women will tell you otherwise. It's easy to say that consent is important. But how many of us practice what we preach? if she was supposedly asking for it, why couldn't you? 
Because the truth is: no woman is asking for it, unless she is literally and verbally asking for it. 
So, we hate to break it to you, but anything otherwise is not a green light. And when you cross the street without a green light, you are committing a crime and endangering the emotional and physical safety of others.