I think the question has been answered.  Most guys need a recharge after each pop.  For me, MSOG is vital in this hobby b/c I will pop very early the first time-- doesn't take much effort on her part-- just give me a will orifice, and I will cum in 10 seconds or less 
Now this does bring up one subject-- how to handle the pops.  I'm sure most girl don't want their kitties pounded for 2 hours.  All I have to say is that a guy doesn't need to pop in the kitty every time.  God gave a lady 3 openings (granted most girls only allow 2 to be used), but there are other ways to pop-- hand job, between the tits, etc.
Best MSOG I ever had was with a lady who literally put her mouth around my cock for an hour straight.  She just kept sucking.  Even when I went limp, she sucked away.  Eventually sucked me off to 4 pops in an hour.