A few things we know ...
Elves as a race have greater stamina and endurance than Men as a race.
This would logically extend to the bedroom.
It's well known that women on a whole, outlast men when it comes to sex.
One would assume this applies to Elven women as well as human.
So, on one end of the spectrum, you have Elven women, practically insatiable.
On the other end, human men ... *pft*
So you see, Aragorn can never, ever please her.
On the other hand, an Elven male, being a little more limited in terms of
sexual performance, is more within his reach.
Given the aforementioned difference in stamina and endurance, one Elven male could quite probably exhaust one Man.
But not, perhaps, two.
Especially if both men are consummate warriors, and thus at the peak of
physical condition for their kind.
Biology proves -
Boromir, Aragorn, and Legolas are simply meant to be.