There is actually a good source for PE research. It seems to have all the answers, along with instructions, precautions, and plenty of information about what to do and not to do.
Here’s a link to share with all who may be interested /forum/index.php? I pass it on to people on the bodybuilding forums who start getting big and muscular, get rid of the gut, and can see their penis for the first time in ages. Then they see it needs help too and wonder if there is a way to make it bigger.