its bullshit... since it is always the same... you want to believe you are .5" bigger because you are feeling better and bad measurements are taken.. if you want to know if its true puch the ruler until it hurts ( be erected though) there are some erections that even if u stop wanking it, it stays up for a few minutes then there are other days that it stays up and in 5 seconds it starts to fall. :) either you have good days always or you got 1 good day out of 15 :) that would suck.