Seven - eight and a half inches is the ideal penis size. Managing equipment like this requires some care and the primary care is to get her really turned on and wet - use a lube if you have to, especially with inexperienced lovers.  When penetrating, some pussies are tight, others soft, inviting and receptive giving pure pleasure.

When a man has a penis beyond 8 inches,  the numbers of potential sex partners decreases,  so to score more often, you are going to have to learn to be more tactful, more gentle and hold yourself back.

Now when you are over 10 inches, getting sex can be a real problem, and when you do get lucky, you will have to hold back and be careful that you don't do her actual damage which can leave her in pain for days.  So now you have a problem, you have to find a love who can take and enjoy your size, so how?

Do appreciate that vagina's vary in size and many will expand,  and as women have more lovers, the vagina will relax to allow a thicker penis and some will extend lengthways as well. So when you find women who can accommodate your size,  look after them so as they will continue to look after you.
Tips:

• Be an honest gentleman -
  Tell her and promise to be careful with her, the take your time to discover how much you can fit in, see how she is responding,  and work out a compromise with positions and the way you thrust so as not to hurt her.
• Use escorts -
  Most escorts should know how to manage a big cock and should be able to advise how best to use it. They may know of women who like big cocks and can refer you.
• Secrecy -
  Wine her, dine her, but don't let her see it until you get it in,  then give her satisfaction.  Once you have won her heart and given her an orgasm, she may succumb to penis worship, be open to experimentation and may expand to allow your full penetration.