Thread:Loconator3000/@comment-5688420-20170525203123/@comment-5688420-20170527204518

Atsuko (Satsuki's mom, not the RtD character) has a heso fetish herself and, in her younger years (and still does to this day, though lessened), used to wear a lot of midriff-baring shirts. Back when Satsuki was younger, he and Atsuko had a lot of mother and son bonding time, which often included Satsuki playing with her heso, which explains how he got said fetish.

For a woman who's approaching 40, Atsuko still looks like a 19 year old at best. Her heso is a deep oval. She used to have a navel piercing, but had it removed prior to givong birth to Satsuki.