Yeah, I'll do doubles on bi's and tri's, but not as often as on bench. My whole workout routine is based on bench and on increasing my max and nothing works as well as low reps for me. Usually if I do a double on curls it;s b/c I'm going for 3-4 and miss that. For me, low reps on curls are tougher on my tendons than on bench. If I do 5 sets of 1-5 reps to failure on curls I have a 50/50 chance of my forearms aching (insertion pt of biceps) for up to two weeks, it sux, but I LOVE low reps and risk it too many times. There's nothing like the feel of total concentration and not being able to even hear the stereo, the do, the wife, nothing, nothing but moving the weight, I love it!!
"I don't like small cars or real big women, but somehow I always find myself in 'em" - KR