I've carried a Glock 26 is an ankle holster often, and it works well. I used Galco's version (link here
). Like UtahCFP said, the wool-lined versions are quite comfortable.
One thing I would recommend is getting the retention strap (which is a separate purchase). It's a strap that goes up the leg and wraps just under the knee (above the calf) that helps support the weight of the gun and keeps it from sliding down. This is really only needed if you're carrying something heavier than a pocket gun, but with an XD40 or M&P40, I'd recommend it.
I looked up "Ninjas" at Thesaurus.com.
Thesaurus.com: "Ninjas can not be found."
Well played, Ninjas. Well played.