Not to mention that if you've been fluffed for a half hour, your load is going to be bigger. There are orgasms.. and then there are orgasms after a long tease. I've had plenty of nuts that dont empty the reservoir.. dunno why its saving up, I'm TRYING to get y'all out! Run along lil spermies.
Anyway, you worry about porn nutshots is like a girl worrying about being the chick on the billboard. Nonsense. Not to mention that if you're 30 and can still shoot it like a teen, they're going to hire you. Well, provided you're longer than usual. Dont worry about it, man. We cant all be Michael Jordan with our nut-hangtime.