Size doesn’t matter. I’m close friends with a dude dating in his 50s and his dick just doesn’t work like it used to after he had a heart attack. The women are usually very understanding and often like the challenge. Someone loving you for who you are wouldn’t even be bothered by something like that as long as it’s about love. And if she physically needs more sometimes, just buy a dildo to help her out. Nothing more or less as if she needs dirty talk. Just oblige and make her happy as she makes you happy.