What exactly is stamina surrounded by bed? Is it related to actual stamina(as within running, jog,sports)?

How is it measured in minutes, whats the avg. stamin & how should one reorganize it?
Detailed answers will be appreaciated.What exactly is stamina surrounded by bed? Is it related to actual stamina(as within running, jog,sports)?
this is usually in this context it mode how long you can keep at it, both physically short getting tired, aswell as delaying orgasm, cus when you orgasm the fun usually ends. i dont imagine anyone ever measured this. its unlikely that someone is going to sit beside the bed with a stopwatch and time it.
i give attention to the average of one session is 40 minutes orso, not sure as everyone picks their own number, and men tend to exxagerate. This would not be 40 minutes of pumping only though, and include foreplay etc.
how ancient are you anyway?