@jilly
... I find male-male spanking porn hugely erotic... I agree with what other people have said here about the attraction of watching a dominant male giving the spanking. I don't know, does it take the dominance to another level when it's a male getting the spanking?
In the area of romance, and all other areas of erotic behaviors, I am as straight as they come. But I agree with you that male-male spanking can take dominance to another level. Most men my age, from the southwest United States, remember the paddlings received from coaches and the whippings reveived from dad. These are memories of being dominated by men in authority. And most of us, if we're honest, remember feeling at least a bit aroused when being disciplined on our bare bottoms.
For my part, I can admit that from the age of about 11, I started becoming aroused when dad was taking me to the woodshed for a whipping. By the age of 12 or 13, I was rock hard before I had even stripped naked. My dad told me not to worry about it... he told me that he got erections before the whippings grandpa gave him, and it is just a normal part of becoming a man. He told me that by the time his razor strop was finished with my ass, my erection would be gone... he was right.
Also, paddlings in the high school boys' locker room were administered right when naughty boys existed the showers (before even being given towels). We saw many boys become erect while still in the showers, as they anticipated their fate upon exiting the showers (especially when other boys in the showers teased them about the butt blisterin' they were about to receive). And most of those erections went flaccid before the paddling was over. This happened to me on several occasions, which always meant a trip to the woodshed with dad later that night. On those occasions, when I received the paddle at school AND the razor strop at home, I couldn't sit down comfortably for a few days!