For what it's worth, if you're into intense orgasms, I don't think you could find anyone to fit the ticket better than Dawson from Corbin Fisher.. That guy absolutely shakes, trembles and nearly convulses when he nuts... CF protects copyright pretty closely, so you can't find a lot out there fo free.. Let me assure you, it's worth the price of admission, though, to see this guy perform.. This is not porn, but I like that it shows you a bit of his personality.. good luck finding more:
The CORBIN Files: Episode 2 - Dawson - YouTube