How do i make orgasms last longer

That's the eternal question.

I don't believe that anyone has an answer... but the longer you wait between ejacuation sessions (up to two or three weeks apart), the more semen that is built up, and the longer the orgasm is likely to last.

 

That being said, there's a classic sci fi movie called "Brainstorm" starring Natlie Wood (in her final appearance), Christopher Walken and Cliff Robertson.  About halfway through the film, one of the technicians has taken the portable unit of the virtual reality visualizer home with him, and is found laying on the floor of his livingroom, watching/playing an endless loop of the experience that he had recorded while having sex with a shaply nude young lady.  The point is that he's reliving an endless stream of orgasms.  When the main chacater walks over to remove the helmet, he lashes out at them, unable/unwilling to stop the sensation that he's now addicted to.

The moral of the story is that too much of a good thing is not a good thing.  It just cheapens it.

You can last longer by reaching a point close to orgasm and then taking a break, and starting again. The more you've ejaculated recently, the longer you will last as well, but if you masturbate too much, you will eventually get sore skin (and repetitive stress injury :)). 

For a more intense male orgasm that's also likely to last longer, maybe try prostate massage while masturbating. Not every guy is into that and that's cool, but I say don't diss it till you try it. Most guys who discover their prostate make it a regular thing, 'cause the orgasm's really amazing. 

You can make your orgasms a bit bigger by going almost all they way and stopping, then rest. You can start up again after several minutes and follow that process until you can no longer hold it. You can also drink lots of water during the day to help produce more semen when you orgasm.