The most absurd thing about Doji is that as a cactus owner myself I can tell you you can gently pet most cacti all you want without pain.
Well. Except the beavertails.
These guys I agree wholeheartedly with Doji about. Freaking beavertails.
NEVER TRUST OPUNTIAS, THEY ARE LOVELY BUT THEY ARE NOT A CACTUS TO TRUST EVEN IN THE RADIUS OF CAUSE THOSE EVIL TINY GLOCHID SPINES SHED AND THEN AMBUSH YOUR PRECIOUS HANDS WHILE WEEDING BY THEM.
Kihaku-Gato's Garden Blog (tumblr import) 