I was walking with my girlfriend and there we see a group of some 25-35 year olds, they were 4 or 5. It was daylight and in a populated area but near a kind of small liqour store so you get the idea. When we are crossing the group all of a sudden a small guy buy ex convict I think (he had a big tattoo on his face) step infront of my girlfriend and hug her then tries to kiss her. She obviously don't let him do this and he let her go obviously commenting something about her. I felt like shit because when this happened I just watched. I'm at best average height and was wearing a jacket so I can't blame my gains or anything like this. I'm mad because I let this happen and more mad because I wouldn't have any control in a situation when she or we would be harassed by a group of people and I'd be alone with her. What can I do? I already practice martial arts and I've been trying wrestling but obviously it's useless when you're a small guy and bigger guys get infront of you (if it was only one I wouldn't even have problems even if I'd be sure I'd be the one losing the fight, I'm talking about groups)