TiTiKEi First Press Limited Edition [English, 260 pictures, Complete, full-Tankoubon scans, properly translated and edited version], by Ishikei (most commonly known as Nise Midi Doronokai)

Just read it, JB, it will have to wait until tomorrow, but I already say AWESOME !

I would like to give some constructive criticism about one thing but I'd want to experiment first, this is also why I'm waiting until tomorrow

" I just can't see why people like it "

There would be a variety of reasons
– no impregnation risk. You know, some women are very strongly negatively impacted by the hormonal effects of contraception, and they may prefer not to have any. With anal sex, at least there's no pulling out and fears that seminal fluids coming out during sex may lead to impregnation. Less worries for the couple, more joy for the male who can creampie as violently as he wants.
– For the man, it's tight, and it's a domination fetish (don't see it negatively, you can also see it as "that woman is mine, anal only came after our relation became steady and fully trustful, penetrating her ass is a reminder she's mine and mine alone")
– For the woman, it's a different kind of pleasure, and it's possible to be stimulated in both the anus and the vagina, for instance with a dildo, or simply teasing the clit (while rubbing the clit during vaginal sex is only easy in some positions)

But, basically, if it's not to your taste, nothing will change it. There's no rationality here, just tastes