Is it normal that i get a desire to lick my sister's ass, whenever i see it?

How would you see her naked ass anyways?

Have her sit on your face and tongue fuck her bald cunt and deep rim her poop chute until she cums , bleeds , pees , farts , shits on your face and in your mouth.

I dunno, my sister had me doing it to her when she was 11 and I was 7. I never really had time to think about it, but I'm glad I did it.

About the only thing with my sister was we used to see each other naked or in shower, and once I asked her if she would come and watch me masturbate. And she knows and even helped me many times with crossdressing. She would let me borrow things of hers and give me help and ideas. But it did turn me on when she watched me masturbate.

Sure i get the urge to lick your sisters arse when i see it too.

When she is in the shower , walk in the bathroom and peel the curtain away while you are naked popping a boner and ask her if you can join her and probably to your surprise she will say bring your big cock and come in and hurry up and fuck my ass and suck her tits she will soap up your cock and nuts but tell her to suck your dirty cock when it comes out of her ass and call her a dirty cock sucker.
Is her cunt bald ?
Did you take baths together when you were little kids ?
Did she say to you in the bath tub when you were both little " can I play with your pee pee and put it in my mouth and play with and lick your balls ? "
Did you say yes and did she do it ?
Did you say to her in the bath tub when you were both little " can I lick your kitty and stick my finger in your kitty and poop chute and suck on your boobies ? "
Did she say yes and did you do it ?
Did she soap up your cock and nuts back then ?
Did you rub your prick on her pink clit and in between her ass cheeks and ass crack back then ?
How old were you both the first time you saw each other naked ?

If you see it, yes, it's normal to have that feeling. Just don't do it.

PLZ BE A TROLL!

i did my sister