Taking different sexual positions out of the equation, and just imagine sticking to one position and one partner. Is it possible to alter your 'thrusting endurance' for that particular position? For example - if you wanted to have a "quickie", you could go at it like a rabid rabbit on heat and cum in say 2 mins flat. Whereas if you wanted to enjoy that particular position for a longer time, you could stretch it out by thrusting away for much longer, say 15 mins plus... Or are we set on one 'endurance setting' regardless of what we want to happen? Or, another way of putting it... can men with a long endurance also cum in lightening speed if they so wish?