Well, I think with shrinkage it has to do with temperature if it gets too cold (shrinkage meaning not to do with the typical flucuation that occurs throughout any given day with the penis) then my penis might be about 3 inches or less. I'm not sure about girth. I think with shrinkage it has to do with your mental state. I have had times when I might be worried about an encounter with a girl and I might think about it too much like say at dinner or among friends and it might happen then. If it does then the only thing I have to do is start flirting with a girl or touch them playfully and I'm back to normal again. Another thing to consider is the lack of bloodflow during exercise. I know I get some bad shrinkage during workouts, but back to the question of why I experience no shrinkage after an erection...
I'd say it is because my penis is somewhat still aroused and it will keep in a state of readiness if you will. I don't think P.E. has played a big role in that scenario. After ejaculation it might have, but I don't really know for sure. Length sessions do tend to give me really bad shrinkage, but I wear an [words=http://www.phallosan.com/shop/catalog/default.php?z=eNortjIxtVKyL0pNszWxMFcrSSxKTy2JL0hMT7U1UisoykyxtbBQSy4tLsnPjS8uKcrMS7dVsgZcMMpbEbo%2C]ADS[/words] now and it helps tremendously. I notice it even when I don't wear the [words=http://www.phallosan.com/shop/catalog/default.php?z=eNortjIxtVKyL0pNszWxMFcrSSxKTy2JL0hMT7U1UisoykyxtbBQSy4tLsnPjS8uKcrMS7dVsgZcMMpbEbo%2C]ADS[/words]. I didn't Penis Enlargement yesterday at all except when I went to bed (I wear the [words=http://www.phallosan.com/shop/catalog/default.php?z=eNortjIxtVKyL0pNszWxMFcrSSxKTy2JL0hMT7U1UisoykyxtbBQSy4tLsnPjS8uKcrMS7dVsgZcMMpbEbo%2C]ADS[/words] all night on most nights now) and during the day I was longer and I just felt bigger down there.