Loads of guys don't use test.

For decades, European bodybuilders didn't touch the stuff.

I've never run Deca alone, and that's probably the only compound I wouldn't run on its own. I do know guys, some of 'em older bodybuilders (50+ years old) who run the stuff alone, and love it... never having negative sexual sides.

But again, I wouldn't suggest it.

At the end of the day, people respond differently... but one should still factor in the general consensus when making decisions of this nature.