I have heard that this is true. Not that I have any personal experience in it but males build a fat pad over the pelvis, which would cover some of the base of the penis. One would then think that with weight loss, this fat would disappear, and then more penis would be visible. As per the original question, the rate of this... it would be rather personal, I believe, fluctuating from one man to the next and depending upon where his body fat builds up.

And osuche, where do you think dildos come from?

__________________
I see your fantasy... you want to make it a reality

Are you in the mood to be subdued

You see these shackles
Baby I’m your slave
I’ll let you whip me if I misbehave

Tie me to the bedpost

I like it rough
cause I'd rather feel pain than nothing at all