Yes, but not because of any special physical properties. It hurt more because at the beginning of the year the teacher would introduce her/himself, and second on the list was a loving description of their own personal, often highly stylized “enforcer”.
No kidding, I was a student in Detroit late 70s, early 80s, as my neighborhood went mostly white to almost entirely black. By 3rd grade all my teachers were black, and some of them had some pretty extravagant paddles, some with a real detailed history and ornamentation. Many of them were from Africa, made from wood from Africa, hand crafted and cursed by some witch doctor so it hurt more, made of denser wood, with beaded handles for a better grip, and so on.
Sure, most of the teachers were probably stretching the truth a bit, having fun giving us reasons to avoid the things, but it worked. Those storied paddles always seemed to sting just a bit more. The best one though, was the teacher that was so sure her paddle was too much for young kids like us, she kept a stack of paper plates on her desk, and depending on what you did wrong, she’d give you a number of plates to dull the pain. Didn’t matter, just being young, naive and thinking that thing was fatal was enough to scare the crap out of you.
Other teachers didn’t bother with the stories much. I had a gym teacher that had a heavy iron bar. He never needed to correct us. Of course, he was also a big, mean looking black guy, nobody questioned that he’d actually use it. I bet he never picked the thing up more than once a year during his fear-inspiring presentation.
Of course, you had the abusive types, but it was like with parents. One teacher only used a flexible ruler, but she used it all day long. Use the punishment too much, the kids got used to it, it became a pride thing to get smacked with it. On the other hand, the teachers that rarely paddled someone seemed to benefit from peer pressure effects, if they paddled you, you must have done something pretty bad.
As for spanking and sex, paddling was out before I started thinking about sex, at least, sex with older women (like those all the way in their 20s!), so I don’t think it had much affect. Of course today, a sexy woman is willing to get naked for me, I’m more than happy to spank or be spanked. Whatever helps keep her naked.