About the RK

Sorry if this is the wrong category

But this is about the reverse kegel.

What's the goal with Rk? I do 2 min x 8 sets.
Is the goal to hold it for long period of time? Example instead of 2 min x 8 sets, i could train myself to hold up to 16 minutes? Would that be just as beneficial for lasting longer in bed ?

Don't apologise you can hold a kegel for 2 minutes??

Actually i can hold it for about 6 minutes.
But is that the point? To hold it as long as you can? Or is 2 min x 8 just as good as a 16 min hold?