I'd rape Shinji. But not because I was sexually attracted to him. His tears would taste delicious.
I'd rape him because I hate him. He makes me angry and all I can think about is violating him and making that bitch whine and cry. A person with self-esteem this low can only go lower. I'd start off by making him suck me off. As I was about to cum, I'd push his entire face into my crotch and smother his nose with my pubes while I cum down into his belly.
Next, I'd turn him over and rape him up the shitter. After getting my dick all brown and nasty I'd rub it on his face and piss all over him.