I was fooling around with my girlfriend last night and we got a little too carried away so I started rubbing my penis on the outside of her vagina. It eventually got even more heated up so I decided to put it in. It went in maybe 3-4 times and I looked to see a sticky like substance on the outside of her vagina. It was after a long day of walking so could it have just been her discharge? Was the wetness on the tip of my penis just from her wetness of the vagina? Someone please help me.