Try this and let me know what you think - it’s a firegoat original (firegoat jelq?), but works along similar lines to what you are talking about. I don’t think of it as a head exercise, just an alternative jelq you might like..
Instead of normal jelqs where you move your hand up your shaft, try gripping the base of your shaft with a fairly hard erection (so it’s advanced and can create a lot of pressure - caution needed) and your pelvis pushed forward.
Don’t move your hand up the shaft to create the jelq, keep the hand still and pull the pelvis backward instead to move the hand up the shaft.
firegoat is fully RETIRED from Thundersplace.
All injuries happen from "too much", or "too much, too soon" or "doing the exercise incorrectly".
Heat makes the difference between gaining quickly or slowly for some guys, or between gaining slowly instead of not at all for others. The ideal penis size is 7.6" BPEL x 5.6" Mid Girth. Basics.... firegoat roll How to use the Search button for best results