My dick is about 9 inches long when fully erect and something I love to do is jerk off in front of the mirror. This makes my cock look even bigger and it's such a turn on! Obviously I do this when I'm home alone and know I won't be disturbed.
I go into the spare room, shut the door and the curtains and get down this mirror. Then I sit on the floor at the foot of the bed. I take my pants and underwear off and spread my legs, with my dick in my hand. Then I slowly stroke back and forth to help it get erect quicker, but I get a hard-on so easily anyway, so usually I'm raring to go. Man, that feels awesome!
I love to sit there and watch my cock in the mirror, fascinated as it stands to attention like a space rocket. Then I stroke faster and faster, jerking back and forth. My balls bounce up and down and my cock does a little too. A few minutes later I let out a sigh as I come. It takes a bit of skill to cup the juice so it doesn't squirt everywhere as I usually have a big ejaculation.
If I go blind from my daily habit, well, so be it...