I thought I should be more specific about the exercises I used all those years. I started with simple grab head behind corona and pull very tautly and hold for a few seconds, then relax, then repeat several 100 times every day. When I got tuned into the communities that have been doing this elongation for a very long time I switched to several more complex stretches but my favorite three are briefly described below.
Foot long stretch. With outturned right or left hand grab penis tightly behind the corona encircling with thumb and first finger (others also if you need them), pull outwards from body with elbow of that hand pointed outwards. Then grab bare foot on opposite side of body and place the heel on the back of hand near your dick and then use leg muscles to push outwards very forcefully, relax after a few seconds and repeat as many times as you can stand.
Cross handed stretch. Start as for the foot long stretch, but forget the foot; move opposite hand with palm down under the outstretched dick and work the hand up and on top of wrist that has your mighty meat in its grip. Then pivot the dick downwards over that hand supporting the dick and repeat a bunch of times.
Twisted stretch. With both hands grab alternately with left then right hand near the dick head and twist 2 to 3 complete rotations until your dick looks like a wrung out dish cloth, grab behind the head with either hand and stretch out this coiled cock as straight as possible. Sometimes I was able to get 4 rotations but even 2 will do wonders to give lateral as well as longitudinal stretch to your dick.