Tomorrow is a big day for me. I'm going to try and get in 4 consecutive pull ups at the gym.
I see guys doing weighted pull ups and think, "I could never do that."
Actually, I'm doing weighted pull ups all the time except that I have the weight attached to my tummy. If you're heavier and still want to do pull ups, it just takes longer than someone who is lean. So don't compare yourself to others. Do what you can, and that will be good enough.