It's so true-- it's how your guy uses it- The media- probably starting with the first Hustler magazine-- gets the guys all paranoid about if they're too small or not. They should relax.
Also- If a guy is too big for his girl, and the sex for her is painful because of it., then the guy should start out slow and he will eventually be able to enter. "Banging" his way in sounds erotic, but starting out slow and working up to that brings better results.
I also would suggest the woman getting a healthy lubricant lotion no matter what her age- and especially if she has a smaller vaginal opening. They have some good all natural plant based ones with no chemicals whatsover in the healthfood stores. I have this one I like that comes in a yellow tube- called "Un- Petroleum Multi-purpose Jelly. They're website is www.avalonorganics.com
Sometimes a little lubricant at different times of the month makes sex more enjoyable for both!