Okay, I’ll bite.
The long version…
Training your legs temporarily raising your testosterones a little has nothing to do with the fact that they are near your genitals, but a lot to do with the amount of muscle you stress. When you train your legs, you train the biggest muscles in your body.
Training your legs before training any other muscle would be just stupid. The minimal advantage of raised testosterone levels would be countered and more by the fatigue and burned energy you receive from it. Also there is the over-training aspect.
What comes to testosterone and PE… You could inject several grams of testosterone into your blood stream and your dick would still not grow. Adult penis just doesn’t react to it that way. And no, it doesn’t even give you an indirect benefit, quite the opposite, as it strenghtens ligaments.
"Be aware that there are several schools of thought here as well. Some seem to go with the hard and heavy approach. The sessions are brutal. You can hear them talking to their dick: You better grow mofo or I will punish you even harder tomorrow! Others seem to favor a more tender approach. Always listening to what their member is saying while massaging it gently and singing to it with a soft voice. If it is moody and not happy with new behavior, they always listen and are very understanding."