Ok here is everyone's homework and it will help land the plane "so to speak" for everyone as well.
Go to Home Depot or Lowe's or whatever and go to the PCV pipe section and find a 2 1/2" pipe. Look at it hold it whatever you like, what you have there is something bigger than 7.5" in circumference.
Very few women could get this inside them much less being fucked by it for any length of time.
Visuals are the best...go try it and get back to me and tell me what you think
Ah. Gotcha. Maybe I need to rethink my dream-sized johnson of 9X7. There might be something to the perfect-sized 8x6 argument after all.
Thanks for the post.