For a couple of months now, I have not been able to pull my foreskin all the way back, whereas I could before. Also, it feels as though there is fluid in my scrotum that causes my testicles to sometimes be uncomfortable. I am 22 and I have not had sex. When I get aroused I notice that the pre-ejaculate has white bits in it and smells bad, and sticky compared to normal, do you know what's wrong?