Sowrong: 5" is a bit under "average," but as I have always felt, who wants to be just average?
Below, my husband is 4 1/2" when he is fully erect. From personal experience, I know he is small. And that should be obvious by seeing his 4 1/2" cock compared to my lover's cocks.
My husband has never been able to make me orgasm, but most every lover I have been with has.
I think that in many marriages and relationships wives are content with their husband's cock size, even if he is small. For many women it is the man they love, and not for his penis.
It is because I have the freedom to be with other men, and every lover I have ever had has been bigger cocked than my husband is, that I have come to prefer larger cocks, not just because they are big, but because of how they feel inside me, how strong my orgasms are with larger cocked men and how larger cocked men make me feel much more feminine.
If your wife likes your size, I say don't play with fire. I know from personal experience, and from friend's experiences, that once you experience, and really enjoy a larger cock, you'll want it more often. You'll even begin to prefer larger cocks.
Below is my husband . . .
And this is what I prefer . . .
So, the way I see it, from personal experience, if a man is "average" sized, then he is small compared to a lot of other men.