I have personally met at least 4 women in my life that prefer penises under 5”. So, yes, there is a “right fit” for everyone.
. . . I know men and women who are in relationships with men with small penises and are completely happy. Penises come in different sizes, as people are unique and this is normal.
I'm one of them. My wife is gorgeous, the love of my life, the girl of my dreams. Now most of her previous lovers were well hung, but she seems totally happy with my smaller cock, especially for oral.
Scattershot thoughts on the subject: My guess is that most women, if they had their druthers, would prefer the bigger size, but smaller ones are usually not a deal breaker.
And there are some who for some reason really really dig small ones. I picked up a cute chick one night. I'll call her Carol. I later found out she was the best friend of a girl I'd gone with named Barb. When first describing me, Barb said I'd be the perfect size for Carol, who claimed she could only comfortably take smaller cocks; bigger ones hurt too much. Carol told me countless tales of guys who she had to break it off with because they were just too big. Once, at a dance place, she introduced me to one of these way-too-big former beaus; she later told me she had let him know she'd finally found the guy with the perfect small cock for her. He congratulated her.
Sheesh! 
We went together for a few months. One afternoon we had a 3-way with my friend John, an ex, tough-as-nails marine. John has a thick 6-3/4 inches
(he told me!). John and I are built similar, same hairy chest, but he's one of those guys who seems to attract women despite being ugly as sin.
(Think Charles Bronson) Only after he'd been plowing her for a few minutes did it dawn on me that she wasn't having any trouble at all taking his big, thick dick. Just the opposite; she couldn't stop moaning and screaming. I never brought it up. I figured she might have been claiming to like small ones so much just to land me. It worked, especially after I realized it was just a game. John may have had a thick 6.75 inches, but I was a lot cuter.
I think most women who like small cocks do so more for the erotic aspect than the physical. I've had women go completely nuts over me, even though the fucking wasn't that great. In my case it's probably the contrast between a tall, muscular guy and a small dick. Maybe a small dick looks especially vulnerable or something on a big guy. Dominant women and "feminists" seem to find small ones a real turn on for some reason. Easier to boss around, I suppose.
