Pay attention, the measurement must be done from the pubic bone to the tip of the penis.
So a penis of 10 cm is considered normal. It won't never affect fertility by itself. It won't never decrease your satisfaction by itself.
Concerning the satisfaction of your partner:
- The vagina is innervated on all its length and even more just back to its opening.
- The vagina size is 6 to 9 cm when the woman is not aroused
- The vagina sized increase to little bit more then 10 cm when aroused. So there won't be any problem during intercourse.
So get married and you won't regret it!