You have scraped the million dollar question.
"Does masturbating effect Penis Enlargement?"
There is no right or wrong answer, only what works for you. I suggest you do what works for your the way YOU want to do it for lets say a month. And if you get gains then continue. If not change it up(talking about the jerking it prior/after).
Keep in mind everyone is different, what works for you may not work for somebody else.