I m15 saw my first ever erect cock when at 7 I accidentally barged into the bathroom and caught my Dad in the bathtub with the top half of his penis protruding from the water. I will never forget it, it was wet and shining from the water, standing arched back, stiff and proud with a broad flared glans beautifully glowing red. His scrotum was taught and wrinkled with his big (massive compared to mine at the time! wow!) testicles held tightly hard up against the bast of his erection. He smiled at me and said hi, I blushed and stared at his penis as long as I dared and then fled. I will always fantasize that i touched it that day, because now every erection I see is automatically compared to my father's amazing manhood.