As a newlywed, his was just about 8". Now, 25 years later (and about 100 extra pounds), it would seem to be barely 5". As this isn't a subject one can easily talk about, much less gain information about, I'm hoping you may have an answer.Thank you for your time.

There's that expression, what you see is what you get. Well, that doesn't apply to the male anatomy. That's because part of the penis is buried beneath the skin. Now if a man adds a lot of fat to his middle, then the part that is under the skin is going to get bigger and the part that sticks out is going to get smaller. So for your husband to regain some of the size he lost, he is going to have to lose some of that weight he put on. Of course the aging process may also affect the size of a man's penis, because as a man ages, his erections do not get as hard as they did when he was younger. But it sounds to me like most of the shrinkage of your husband comes from his weight gain.