Do you believe a woman grabbing a man who she isn't in a relationship with and kissing him on the lips is equally unacceptable/sexual assault?
Course it is. Would you want anyone you're not attracted to grabbing you by the face and kissing you? I wouldn't.
Let's say your boss or a client grabbed hold of you at work and kissed you in front of your coworkers. Would it be ok in your eyes?
Or some bloke at the Amex after we scored a goal?