To the OP, you can't change the size of package you were given, so do the best with what you have. The good news is the following:
1. The vagina stretches and shrinks to accommodate all packages (thank you for that one God)
2. You can change how you groom, smell, how fit you are, and how much you dedicate yourself to foreplay
3. Some women prefer smaller packages for the back region, so you may have lucked out there
.
4. See 1, 2, & 3 and repeat
And a bunch of other reasons I'm sure other people have already stated.