is it possible for a man to perform sex the whole night?

Tantrik sex claims to give you such powers. It was once claimed that the rocker Sting could do it all night though he himself never confirmed or denied it. I personally think humping all night would get sort of boring.

Yes, if he or she has enough energy, passion, technique, and experience to last. Performing sex isn't just about banging a partner and being done with it. There are ways to extend the time, using all your talents and developing skills to satisfy someone all night. I could post more, but I'll just leave it at that.

Yes its possible

there is a man in my city who can perform ***** without getting tired for a whole week.

and his name is in the guinnes book.

No - eventually the Refractory Period would kick in even if it doesn't happen after the first 'performance'

I don't know,nwvwe had sex in a decade or so, and really don't care to any more ... too many STDs out there , that an no willing partners , and even if there were still too many STDs

If they have the energy but if you over do it then you can end up dead(your body quits after a while)

Probably not.