NO DONT USE THAT STUPID CRAP. If you want to increase your erection strength, try this:
a) don't stick things in your bum (your prostate is there so i'm pretty sure pushing forcefully on your prostate will do nothing but stress the flow in your penis)
b) do your kegels!
c) I find a breathing technique works like crazy for me. First flex your abs really fast, and as soon as you do that flex your chode (the part of your penis between your balls and your ass). I discovered that about a year ago and it works, and makes sex feel way better!