I see people praise guys like Erik Everhard and Alberto Rey for the number of times they cum on the girl in a scene, which is better than nothing, don't get me wrong, but maybe the best measure of the scene's sexual chemistry is the total number of spurts he's able to muster during the entire 15-30 minutes they fuck, more than the number of times he can stroke off.
I know Peter North is famous for his huge facials at the end of scenes, but I was just watching a scene from Cameltoe Perversions 2 with Jezebelle Bond where a guy named Sasha unloaded two huge cumshots on her -- something I've never seen North do in any scene. This got me thinking he might actually have shot more cum than Peter North. It's hard to estimate volume, but spurts are easy to count. Many of North's classic scenes have 10-12 spurts. Turns out Sasha shot 10 spurts in the first load, and 6 spurts in his second load at the end. She must have really had his testosterone pumped. I really doubt Peter North has ever unloaded 16 spurts on a girl at the end of a scene.