Having my nipples sucked definitely relieves tension, then again, it usually leads to a lot of other endorphin releasing activities.
I guess. But unlike full on masturbation, any breast stimulation is kind of like tickling myself. It just doesn't do the trick. There's something about facial hair, and hot breath, and grinding bodies that goes along with having someone else do it.
Sex, working out, sleeping...sometimes just putting it on paper is a big relief. You can put all of your frustrations into text lol.