She's normally just a degenerate, but she speaks the truth. There are no plants called "plant" and no kinks called "kink". Normalcy doesn't exist, only a bell curve of interest over a population.
And it seems our heroine is just likes vanilla like a cultured individual.
"Ayo what kind of doujins you want"
"Aw you know me fam get me that consensual sex in the missionary position between husband and wife for the purpose of procreation"