Man... it also happens with me... whenever im high is far more difficult to pee... i have to concentrate all my mind in the task of letting it flow... i think what your doctor told about one muscle relaxing and another contracting is true, at least for me... it would explain it, as i have a real hard time in relaxing the muscle which allows the pee flowwww... but when it does... what a relief it is... ahhhhh......... mmmmmm....... it an almost orgasmic thing just be there, pissing... :stoned: