Why do onee-sans appeal so much more to me than imouto-chans?

Why do onee-sans appeal so much more to me than imouto-chans?
Does it imply some deeper psychological things?

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>mole near the mouth
Why is this surprisingly sexy?

Just means you got good taste, bro

How in the fuck do you want me to know why you like something? I'm not a fucking psychic or your psychiatrist.

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>Does it imply some deeper psychological things?
Honestly if you only realized this within the last 5 years, you're just getting caught up in the promised age of the onee-san.

Ever heard of a beauty mark?

Well there is the basic shallow angle for starters. Onee-sans are just hotter. Typically taller, thiccer, big tits, long hair. Typical onee-san is the alfa female who is the envy of all other girls.

>`beauty` mark

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onee x shota is god tier

too bad most /ss/ is milfshit

No wonder the art looks familiar. This is the Amakano artist.