Let me tell you something man this is one of the great debates of this community and there are no definite answers. Personally i prefer to not jack off afterwards. This helps me to the build discipline and control that i need during sex. Also if you don't jerk it you're supposed to have a higher level of testosterone which helps make your penis larger although i have no idea if this is true
There is no scientific proof that proves or disproves whether or not masturbation effects PE gains or whatnot. If you want to do it, do it. If you don't, don't. Sometimes I do if I'm in the mood.
If your gonna do it , does it make sense to squeeze only when your pulling away from your base and not when your hand is coming back toward your body? It just seems like squeezing as your coming into your base area may undo all the work you just did
I see only one problem with it if in fact it could be considered a problem. Training and conditioning your unit to grow by exersize seemingly would be more successful if its not confused with masturbation. If your body (and dick) are seeing PE as a form of masturbation then growth surely would be slowed. This is why I would always keep them seperate.