
Haji said he is sleeping around with half animal to gain experience before truly finding someone he want to stay together with. The whole " i fall for his body and not his heart" is solely for horang that is why he is reject horang also haji is looking for human partner so he wont be getting to know his sleep partner better because they are half animal. Haji literally use the dating app because everyone there is looking for one night stand like him that is why he is mad when horang show up because we know horang didnt want just sex but also want emotion to be involve

Ok I understand the situation a bit better now. It still baffles me how on earth he came to that conclusion. Experience with sexual activities will only give you experience in sex (the body) and not the heart. To know the heart, you need to allow yourself to fall in love wih many different people, go all in, suffer heartbreaks, etc. to gain "experience". His logic doesn't add up and someone needs to make it clear to him.
I have nothing against people that enjoy one-night stands. It just bothers me that he said those words to Jiho when he had been through the progress of their relationship from the beginning.
In fact, he himself knew when Jiho fell,before Jiho himself was aware and it was an accumulation of little things rather than body. I mean, they haven't gone all the way yet and I'm pretty sure they haven't even been fully naked around each other yet.
It's just one of those situations where you unintentionally plant your own seeds of doubt onto someone else who was previously fine. Plus, guy was clearly extremely melancholic when he said those things, which makes me think he has a ton of issues to work through himself before handing out anyone advice.

Ahh i just reread the chapter apparently he not only sleep around but also try to date as much as possible so he can pinpoint what kind of guy he like ( you know finding out which personality you like blahblahbla) and then go find a "real" love after. I think as long as his partner isnt that serious too i dont see the problem with it.
Also jiho tell haji that the black hair guy jerk him off several times already + jiho used to like a girl not long a ago to the point he want to give his marble to that girl (that is how serious jiho) even if i was at haji position i would also ask jiho if he truly like him and not because of all the sexual activity they did. After all that guy is the first person jiho did sexual activity with so haji is just concern for his friend. And also jiho is the one that ask haji for his advice not the other way around. Tbh haji has been very supportive of everything jiho did he just asking so jiho wouldn't regret mistaking sexual love as "true" love. Its not planting seed of doubt but its to help jiho to truly understand his own feeling. At least that is what i think.

Well it could be interpreted in that way despite a few discrepancies with the characters expressions that were drawn in certain scenarios etc.
But with Jiho. He didn't like the girl seriously at all. In fact, he went on his first date with the girl and decided to propose with the marble...FIRST DATE.
Plus after that day, that girl has just like vanished lmao.
I can understand why Haji is concerned though. Jiho is naive and childish as hell. Apparently no one carries their marble, a very important thing, around outside...
Haji is weird af. If you're not sure about your feelings being solely sexual then you would do the direct opposite of sleeping with people. You would get to know them in a platonic, non-sexual way. It just seems like he's finding an excuse to justify his horniness, insecurities and commitment issues.