if you used to be able to 30 min...and all of a sudden you can only go 30 seconds? i would GUESS that's probably a psychological problem. i suppose there might be some slight chance that's a physical problem...? as your doctor just in case...

if it's psychological...then...i don't know...maybe you should cool it for a while and abstain from having sex. get whatever is might be bothering you straightened out...

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You don't scare me. I got chunks of guys like you in my stool!