1.) I am 21 year old male, I don't get a perfect and stable errection while going to have sex, what should I do? 2.) I got fat recently, so I am trying to hit gym, but when I do some abdomin excersice I get a muscle cramp in my stomach, it's a lot of pain. How can I avoid it? 3.) I recently got a black pigmentation on my cheek, how to make it go away?