It's much more complex than that! To share some experiences...
In my 20s, I came quite fast. Mostly before my partner, which left her quite dissatisfied!
After having kids (like in many cases), the situation changed. Earlier it was sex every night. After not getting sex for many days together (sometimes weeks ... small kids, liable to get up in the middle of the night etc), I had to depend a lot on masturbation for relief.
This kind of maybe desensitised me ... making my orgasms very delayed.
Some of my friends complain of coming within just two minutes! They are probably premature ejaculators. In my case, I could go on for 20-30-40 minutes...especially if your partner isn't very enthusiastic... which can be a bit of a problem too.
i think it s according to the person and how experienced is the man ,well I can go for 10 minutes and that s because I penetrate then I stop for a minute to have a forplay ,wihch is very stimulative to the women and on the other hand it s elongating the period
but I really think if some one was off for 20 days ,semen will accumulate and of course a man will ejaculate faster and t s according to the women too and how the chemistry between them
A guy gets a boner and it sends a signal to his testicles to produce semen. The more calls to fire he gets, the more semen is produced. If he didn't think of sex all day then no calls to fire would have come down the pipe (pun not intended) and thus he wouldn't have that big of a jimmy wiggly pool.
Other factors that influence this is stress, smoking, eating habits, alcohol, etc. Beans and tuna help produce more of the stuff semen is made of. Alcohol and other foods have the opposite effect.
If he rubs one off before you guys meet to take the edge off, then his second time around might last longer. It might take a guy 20-30 minutes to prep for another launch.
My ex had a masterbation problem and cheated a lot. When HE wanted to have sex it would last forever and he would only come a little. If he's not the cheating type you may just excite him a lot and its hard for him to control if he cums fast, but if a guy can last forever and you two aren't having a lot of sex...he's either touching himself on the regular and controlling it or getting some on the side.