I cant seem to cum just by jerking off. Maybe I'm not persistant enough but I just get soft after awhile. Is that normal? Also, I've figured out a method of stacking pillows on top of each other with blankets between to make the stack taller and two pillows near the bottom to stick my dick in and i lay on top and thrust and it feels so good especially with soft fuzzy pillows. i usually have boxers or a sock on it(literally) to catch the cum. anyway, i can cum in less than 30 seconds this way sometimes if I try. Why cant I do it one way and so easily another? if you want, try it...
could be age, could be health, could be a mental thing, could just be lack of other stimuli, or all of the above
maybe. it's not age or health, both are prime. do most guys need to watch something naughty for this to work?
Try finding new things, different things that you might have never considered jerking off to. Mental stimuli or anal stimuli work well for most.