Yes, Euhan is pathetic, but the proposition makes sense, since the uke temporarily stops being harassed by the spirits when having sex with Euhan. Because the uke is very angry with the seme (rightfully so), in the context of the story the proposition brings some benefit to the uke, while at the same time the seme shows his most pathetic side, accepting to be merely an instrument for the uke to get rid of the spirits.
Yes, Euhan is pathetic, but the proposition makes sense, since the uke temporarily stops being harassed by the spirits when having sex with Euhan. Because the uke is very angry with the seme (rightfully so), in the context of the story the proposition brings some benefit to the uke, while at the same time the seme shows his most pathetic side, accepting to be merely an instrument for the uke to get rid of the spirits.