I keep thinking of my porn-induced fantasies and I get huge erections, to the point of I'm afraid I will cum. The point is I want to stop that and think only of girls I meet everyday, which I do sometimes. How can I deal with such fantasies? How can I block them? Also, I've been thinking about my last sexual encounters where I acted on my porn-induced fantasies. These past memories give a hard time concentrating on my streak and lead to more porn-induced fantasies.... I really need to deal with fantasies.