Exactly ! I'm in a serious relationship right now and I'm not gonna sleep around. But before that, I had tons of sex-friends and I would not allow anybody to call me a slut just cause I enjoy sex.
All I can say about it is that if you are in a sex-friendship, it means that you are first in a friendship. Wish means that you're not romantically involved with the person you're sleeping with. People really need to make a distinction between sex and love, jeez.
The manga is poorly written, seriously. Why does the uke care about the fact that the seme sleeps around ? I mean, that's just slut-shaming. He doesn't love him or whatever but is mad nonetheless ? Yeah sure.
Hooooy, the uke is so stupid... Naïve as fuck with the common trope of "I am not good with people cause I am a loner." Fuck me in the aaaaass. "I need to kiss you and suck you off for a medical examination. - Oh really ?" Oh, guess we have a maiden.
Everybody is trashing the seme when it was never wrotten that they are in couple or whatever. They are just sex friends. When you are sex friend with a person, you don't expect them to sleep with just you and you don't throw a tantrum because he slept with over people. Seriously. Everybody is slut shaming him when the reality is just : Bitch is a sex-addict and is enjoying himself.
Why do everybody expect the seme to be trust-worthy ? They are just sex friends. And slept together once. If I was the seme and my sex-friend ran away cause I slept with other peoples, I would just be : Well, what did you expect ? Imma not gonna marry you, you know.