I have been watching online porn since i was 13, and i already had my computer with internet connection, so i was already watching videos at that age. About the kinds of porn, in 20 years i would like to say i watched almost everything you can watch. About how much, it depends, some days i could masturbate 3 times, some days 1, but it was very rare for me to not masturbate for more than a day, for all the 20 years period. I think porn has always been my rock, the thing i go to for solving all my problem, from when i was 13. So, i personally think it was quite bad. If it influenced my behaviour? I practically have grown up with porn, so i can't answer that because i don't know how i would have been without it!