Some hang weights from the penis to stretch it. This is nothing new. In African tribes it has been done for thousands of years. Some very young boys were selected. Progressive heavier weights were hung on their penis, thus stretching it out.
This lengthening by weights only works if it is started very early in life. In places where this was done the boy left the weights on all the time, every day. Every time more weighs were added.
This was not done with too many boys because after a while they were unable to get an erection and thus unable to make a girl pregnant.
When the penis becomes longer, the girth normally decreases.
Don’t try to lengthen your penis by using weights. You might end up with an erection problem.