>>8603954
I have an older sister that I have absolutely no sexual attraction to what-so-ever.
Even when she was in her teens and she was a an attractive goth girl I felt absolutely zero romantic or sexual feelings for her. She's a fat schizo now and I haven't spoken to her in over a decade (nobody in the family has).
I don't really actively seek out the incest tag. Little sister is kino though. Onee-san stuff can be fun. I don't know if I'd feel differently if I had a younger sister.