In my experience in Penis Enlargement this is normal, I dont know if this is correct but I'd imagine the penis pulls back as a sort of automatic protection mechanism, its like your size is written in your dna and you are going against it. Anyways.. Back in the day before the [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extenders[/words] and mainly before [words=http://www.mattersofsize.com/forum/showthread.php?64036-My-Best-Work-Ever-Penis-Enlargement-will-Be-Changed-Forever-gt-gt-Gain%20inches%20with%20SRT-Theory-and-Routine]SRT[/words] theory, many would, and, still skip the part where its a good idea to keep the penis stretched after workouts to promote elongated healing. You have to find a way to keep your dick stretched out at all times and especially after a workout. It will help you physically and also mentally. It is discouraging to pull on your dick for x amount of time, invest some pain and effort and then have it shrivle up haha
Do a search for [words=http://www.phallosan.com/shop/catalog/default.php?z=eNortjIxtVKyL0pNszWxMFcrSSxKTy2JL0hMT7U1UisoykyxtbBQSy4tLsnPjS8uKcrMS7dVsgZcMMpbEbo%2C]ADS[/words] (all day stretching device) or [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]size genetics[/words], or [words=http://www.mattersofsize.com/forum/showthread.php?44-Ace-Strapped-Jims-Joint]Uncle Jim[/words]'s Wrapping Method