what

in the extras it does say he is one when the author does actual character descs

He’s a masochist. He thinks masochism is JUST people who can’t cum unless it hurts but that’s a lie. Masochism is simply the enjoyment of pain (mixed with pleasure or pain without pleasure). He is mistaken.

so he's just not being aware of his nature or doesnt wanna admit it

He’s aware he’s curious and he’s aware he enjoys it but his understanding of what a masochist is is why he’s confused. His understanding is that unless you have pain, you cannot cum at all as a masochist. He’s able to cum just fine without pain so he put 3 and 3 together to get 6 but what he really should have done was put 2 and 2 together. Because 3 was wrong.

well for someone who likes bdsm and practices it he's being poorly educated about it

He learnt about it 3rd hand from a novel… don’t expect that he knows anything about what he’s doing. The top is the only one who knows what he’s doing cause he researched it. The old guy only knows the parts that he thinks is interesting in sadism (water torture, shibari, whips, flogs, etc). Like a lot of BDSM representation in all types of media, it’s very often wrong. It’s like if someone watched the 50 shades of grey trilogy and thought “wow that’s what BDSM is!” When in reality, bdsmers (myself included) are appalled at the BDSM represented. The only actual training and education they got were on the equipment, how someone uses it, how they should hold it and tease with it and that’s mostly it. I don’t think the actual author did any of that. It’s pretty common for people to use stereotypes in media. So while the bottom is poorly educated, it’s realistic considering his source material and stereotypes.