It’s not incest, nor are you fucking your own sister. You are not attracted to her nor will you ever be. Its just testing the odour of your breath, duration of the kiss, satisfaction recieved by the intimacy. I say and mean this unironically; it is indeed for research purposes.
I need someone to test my kisses on and get some feedback, I cant be out here kissing the fucking family dog now can I. I mean I could just hire someone from craigslist, but it would seem weirder than kissing your own sister.
It’s for the sake that when I end up with a partner in the future, I can satisfy them better. Hell, I ll go ahead and say it, there is nothing wrong with practicing different sex positions with your sister, you are doing it to make the special lady orgasm and have her enjoy the great sex. You dont actually like your sister, its only lust.
Even a better idea would be to have wedding rehearsals with your sister. No, too normie. I got a better idea, you could simply marry her forreals. It’s only a name sake institution, it’s not like you like LIKE her, marriage is not a big deal. You could just divorce her later on and get married second time. Sympathy gets you laid, folks. Experience is important and practice makes perfect.
Now, marrying the person isnt the end of the line. You have to have kids with her in order to learn the struggles and rewards of raising children. Parenthood, you could probably teach your kids the same thing about practicing kissing each other, thus making the cycle repeat itself. “It’s not weird” you tell them. Chicks love a man of action and one with empathy. Bonus reward: You learn a couple of dad jokes along the way.
Now you are growing old with your sister and now have reached the peak of romance, you finally know what it’s like to go through the lifetime journey of love. And in your deathbed, only thought will remain in your head, that you are a fucking weirdo who just fucked his own sister. You sick fuck