Ummm, I might have gotten the original derma instead of sustain..........because my balls are kind of disappering, like on cycle. My libido is certainly fine, so there's always the option that I'm just letting go of "charge" before it really has time to build up....

guilty!
Also, been putting it on my balls......obviously started out with just a spray or two to see if there would be a problem, now I'm putting about half the sprays on my sack. Really gratifying heat-tingle followed by some rising wood..........I like it. Now as for gym gains, it's going to be hard to tell.....I'm currently also using HGH because of some joint issues. But I definitely notice some more aggression the last couple days, coupled with the need to copulate...........