People like that made me sick, you did the right thing at the right moment Staurm.
I had that happen to me once almost. I sat at the back of the bus but there were PLENTY of other seats available but he came to sit beside me. NOt only did he sit beside me, he took up a 1/4 of my seat too and every time I tried to move a bit to signal to him he was sitting TOO close, he did the opposite and sat even CLOSER to me. I was a bit disgusted.
Several times during the bus ride he started to rub his crotch and then looking over at me. The bus is a scary place man, I'm so glad I got my own car..

But seriously though, who do people think they are man, thats just so wrong.