Having fun with an unfamiliar hand on my cock while on the bus.

I have to take a bus to get to where i have arranged to meet my friends for lunch because my car has broken down. the bus is half empty and i am surprised when a dark-haired boy sits right next to me. suddenly i start to feel his hand glide across my fly as my cock gets hard. when i look at him i realize that his cock is out of him and he is jerking off while he stares at me and reaches into me. how it warms me to see his hand surrounding my cock until i end up horny, lost and about to burst.