I can boom boom long time too which usually results in the bg complaining that i ''fcuk too mutt'', I think my knob is not as sensitive as it used to be when younger and with condom on i can go on for enternity.
Add a blue diamond into the mix and many just want me to ''finnit''
I think off memory i have only ever had 1 break on me, I always buy Durex out there as its cheaper then the UK for the same product, however the break was a long time ago before i discovered the joys of KY.
To be honest i thought KY was only used by the gay scene for obvious reasons but one of my old flames pointed out it's much better to use than relying on ''natural juices'' all the time.
She was absolutely right and now I never leave home without it, Condoms - KY - Blue Diamonds
Since then i have never had a single breakage so maybe your knob is huge or maybe you ram too hard ?
After certain periods of time, like say 30 mins continuous boom boom,you will notice that sometimes the lady will dry up , I usually pull out at this point nowadays and re-apply some more KY to my angry looking knob :angry:
I find this much better method than to simply continue pumping away after her juice flow has stemmed a little.
Keep applying that KY, that's my tip of the day :light: