You need to do cardio, not curls.
Got a haircut just two days ago , thanks for the advice "Schmoebuster" .. although I kinda liked that long hair hippie look. I let it grow and didn't shave for the past 6 months while traveling the world and to my surprise a lot of women actually told me that they like it... yeah most of them were quite the alternative new age hippie women.
And of course I know that my form sucks and that is not how I'm usually doing it but the task was to complete 40 reps in 60 seconds and all the guys before me were cheating so hard that it did not look like curls at all.. in comparison to that my form was textbook perfect.
The bitches were hot .. stupid but hot.