I remained sexless with my wife for seven and a half years until her death. It made me semi-dysfunctional afterwords. I would take it back if I could and certainly would never repeat it again.

I can stay for 3 maybe 4 hours and if nothing is happening I'm going home.

Longer than I would have wished!

for life, but it would be a stressful one.

Longer as we get older.
In a relationship with no medical reason to avoid it,
I wouldn't stay very long
to me that would indicate we are no longer interested in each otehr

I don't need a woman though id like one and I obviously don't need to spank the monkey but I also don't want to walk around with a boner so I beat the bishop about every day. everyone is different in there sexual urges so I don't see you getting THE answer short of asking the 2,000,000,000 or so post-pubescent boys/men in the world lol.

Define, "Stay."
Relationship dynamics are just that, dynamic. Expecting to stay in a blissful honeymoon state is unrealistic. Entering any relationship with this expectation is unhealthy and self-defeating. Life is difficult enough, without adding these expectations. However, communication on the sexual nature of a relationship is critical. Want'n ain't gett'n!

That said, I personally am very physical. Knowing this of myself, I would only choose a partner that is of like mind. Even then, I realize that this is subject to change. Differently in both cases, so far, it has.

Your post is unclear. Did you how long can a man go without sex, or did you mean how long will a guy stay with a girl if he does not get sex? As to the second, I would stay only as long as it took me to figure out that the girl was using sex as a tool to manipulate me.

A lifetime. No one needs sex. It's wonderful to experience, but no one dies from not having it.

Roughly 4 days before they dry out and die.