Stamina is the ability to keep going. Endurance is the ability to keep going at a high effort level. For example, for me, doing a marathon in 6 hours would be using stamina, but doing the same marathon in 4 hours would be endurance. But, for a world class marathoner, 4 hours would use stamina, while 2:20 would require endurance.

Let me add to my answer: Endurance implies a level of activity that approaches the lactate threshold. If you work above the lactate threshold, lactate accumulates in your working muscles faster than they are cleared.

http://www.englishforums.com/English/Sta...

'However, stamina is more often associated with athletic power, the ability to run long distances, for instance, while endurance is associated with the ability to withstand hardship or suffering. So stamina has a more active tone to it, while endurance has a more passive one.'

http://blog.sitarasinc.com/2011/08/stami...

'When you research these two terms often times they are used interchangeably. However, there is a difference between the two and knowing how they differ can help you improve your work out routines.

Stamina measures your ability to perform physical work over a period time. For example, someone with a high level of stamina would be able to perform a task such as chopping wood for a long period of time without resting. While endurance may require some muscle strength when you are building up your stamina you are using more muscle strength to perform a task.

One person may be able to lift 50lbs and the other person may be only able to lift 40lbs. However, if the person that can only lift 40lbs is able to do more bicep curls than the person that is able to lift 50lbs the person lifting 40lbs has a greater level of stamina.

Endurance refers to your cardiorespiratory work capacity. It measures how long you are able to jog, swim, or ride your bike. These activities do not require a lot of muscle strength but they do require a good oxygen delivery system.

A long distance runner may be focused on building up endurance rather than stamina. If he or she were focused on increasing how far they can run they would focus on building up their endurance. However if their concern were increasing speed, they would focus on building up their stamina because more muscle work is required for speed.'

Premature ejaculation can be cured with natural methods. One really good one you can follow is http://www.goobypls.com/r/rd.asp?gid=565

When a man is suffering from premature ejaculation, he is often climaxing before his partner and in the case of most men it is difficult if not impossible for them to continue intercourse after ejaculating. That’s because chemicals are released when a man ejaculates and these are the same chemicals that make a person feel sleepy and/or not aroused. It’s not that they have suddenly lost interest; just their brain is telling them that the sex is over. This effect is more prominent after intercourse than after masturbation because intercourse actually causes four times more of these chemicals to be released. If premature ejaculation occurs frequently, it can lead to embarrassment for the man and sexual frustration for both partners.

Hope it helps.

The Diagnostic Statistical Manual of Mental Disorders (DSM IV) defines premature ejaculation as a persistent or recurrent ejaculation with minimal sexual stimulation before, on or shortly after penetration and before a person wishes. Wow, that’s not a sexy definition. Personally, I define it as you come quicker than you or your partner wants. Luckly this is a great solution for premature ejaculation https://tr.im/ae0d9