But that time was long after his young days when he didnt know or care about sex and he have said 100 times that he does everything to kill an apostle and have playing a meal for one while he is screwing her isnt anything speciel to him. That monster was a girl so he did what he had to do. Also i find it hard to believe that Miura didnt know what kind of characther Guts were gonna be at that time cause he has been the same kind of characther from the first to 255.