Back in the days when I was still new to penis enlargement and I first discovered the whole "online community" around it, I wondered things like this myself. Back then, all we had was home made devices and they usually worked just a little better than "ok". That was putting it politely.
These days, you have much better options that take away the guesswork and for those of us who are less mechanically inclined, the technical know how that is often a barrier to entry into what is usually considered to be the most effective method to enlarge your penis permanently.
I'm not going to make you read through a 1,500+ long word blog post to get to the bottom line. I've been selling Malehanger online since 2012 and I've sent them to literally anywhere on the planet you can think of. My website software only recently (within the last few months of this posting) gave me a new feature which allows my site to send out review requests to my customers. These are "Amazon.com" style reviews with "verified purchase" notations and star ratings. Only my actual customers get these review requests and they are sent out automatically by my site software 2 weeks after purchase. In other words, it's not just ME making up some reviews to make myself look better.
So, if you're the type of person who likes to see reviews of a product before purchase (who doesn't??) you can check them out at the below link.
(CLICK OR TAP HERE AND SCROLL OR SWIPE DOWN THE PAGE A LITTLE)