I have many women hug me without asking, some will even kiss me on the cheek, happens all the time. I guess being a man, I was never intimidated or saw it as sexual. Helped a beautiful lady going through major breast cancer a few weeks ago, never met the woman before. She just hugged me, no permission. I have several young girls who just walk up and hug me, some know me, many really don't, few ask. I have some pals that go back to the old days when we worked in the vices together for some powerful people; everytime we meet, we hug and a kiss of honor is given on the cheek. It's an act of respect. 
If someone says "No", I would understand "No' to mean no, and that person is uncomfortable with such. I am not a sensitive guy that needs hugs and kisses, I never said no, because I just accepted some women are emotional, and they desire to be so accepted with a hug or a kiss. A lot of women love to hug and usually initiate doing so, some will even say something most intimate when doing so