You guys just reminded me ...When I first moved out west , I was of course not familiar with all the plants and beasties . I threw myself into the job of trying to learn , but alas , some lessons are not learned fast enough . Long story short - I sat in prickly pear cactus while deer hunting . I had cactus fir on my backside from my knee to my belt and everything in between . (Having to drive home 1 hour on one cheek was a trick .) Duct tape got some of the micro spines out , I'd guess about a third of them . The rest came out by more drastic measures , which I would recommend none of you kids try at home (except No1 maurader ) .