I am 22 and I am embarrassed to say that I am having erection problems, I wasn't aware of it at first, but after a while, I started noticing that I am haven't had any 'morning woods' for a while, and being 22 I was embarrassed to go to a doctor or even discuss it with my friends because I know that they will laugh and joke about it, and even if they didn't, nobody in my social circles has enough experience to deal with stuff like this, so I went on to the path of self-medication.
I did not go crazy or go as far as taking Viagra or the sorts, I just looked for ways to increase my testosterone naturally, which did not work for the most part, because nothing is wrong with it, so I missed around with supplements like Vitamin D and B and fish oil.
Lets just say that things changed when I started taking Zinc supplements, I have a higher sex drive and libido, and I am starting to get the random erections throughout the day, I am happy.