Can I make his penis larger without him knowing?

Don’t you ever believe that penis pumps don’t increase size!! They do!!! However the size may or may not be permanent and it only increases the “girth” if and when it does become permanent. It will also increase the length temporarily while the effects of the pump are still active, which is rather short lived to approximately 3 or 4 minutes without penetration and/or sexual activity but the effect of expanding the girth can become permanent if it’s used enough over a long period of time. Most pumps come with a cockring to put on after your pens’ has been expanded by the gorging of blood within the veins and this keeps the size intact long enough to engage in penetration, etc. I have increased my girth from 5 1/2” to 6” over the years using a home made pumping device, e.g. a vacuum cleaner hose attached to a 8” length of PVC pipe, 2” in diameter. This is also a good way of mas tur bating ‘hands free’ that gives both ‘suction’ and ‘vibration’ and is great for “edging” and practicing the delay of your climax. But “DON”T EVER” put your pencil directly in a vacuum cleaner or you might just lose it.