when im erect and i pull my foreskin back, my frenulum makes the head of my penis bend as its pulled back so i was wondering if my frenulum was to short if so how can i stretch it?
That's normal for the head of the penis to bend down like that from the frenulum pulling on it. As long as it doesn't hurt or anything, don't worry about it. If you want to try to fix it for asethetic reasons, just pull your foreskin back while erect as far as it will go, stopping when it begins to hurt, and hold it there for 5 minutes or more. Do this once or twice a day, and with time, your frenulum will stretch and reduce the bending.