I've noticed in X-videos that guys with bigger penises tend not to have extra-rigid erections, whereas smaller guys' erections are stiffer and (apparently) harder ...
Personally, I'm 5.75 long and around, and I get super-hard.
Well, when I am hard I am a good 7 inches. I think this is a little bigger than average. When I am 7 inches my penis is at a 45 degree angle and as hard as a rock. I cant imagine it being any harder. I am still young (early 30s) so that probably has something to do with my stiffness. I would be considered a "smaller" guy when soft though. I only measure about 2 inches, 3 inches if I am lucky.
Age has some effect on erections. However, usually guys with larger non-erect penises become stiff but only gain a little in length. Those of us who are smaller usually gain much in size and stiffness. Course, this is just what I've seen on websites such as this....I wouldn't say I'm an expert on the male erection. I also know that very little we see in porno reflects too much on reality!
Um, I can probably explain to you as to why this is.
Firstly, never always beleive what you see in a Pornographic Movie. Much of the time (although not exclusively) the Actors may be on medications to help with their sex drive etc..
Secondly, a person with a larger penis generally needs more blood in it to make it erect. Whereas a person with a smaller penis requires less blood in it. The answer really relies on the question, where does the blood come from? Well the blood comes from a blood vessels entering the base of the penis and then locked into the penis with a small sphincter/muscle at the base of the penis. It is also the reason why some males with extra large penises sometimes complain of light headedness when they get an erection! <IMG SRC="http://www.healthboards.com/ubb/smile.gif">
But for some men with large penises it may be physiologically impossible to fully engorge their penis with enough blood, whereas smaller guys may not need to worry as they don't require as much blood to engorge!
I hope this answers your question~
Nurse_oz is a Registered Nurse who works in a Major Paediatric Hospital in Australia
Couple of things to keep in mind about porno movies. First of all it is a movie set, they can stop and start, edit, replay certain parts and so on. If the scenne lasts 10 minutes, it could be some of the same stuff shown from a different angle or just plain repeated.
I've read that some guys masturbate before going in to shoot a scene. (Could be the reason they appear soft during the scene.) As you may know if you've tried this, sometimes the second time around during a session, you may last longer. I'm sure these guys would know one way or the other if they do.
They also use other techniques to keep themselves up between takes