You can upgrade 1 organ in your body. Whats it do now?

Since I was born a deaf, you can imagine it’s an easy answer for me. I'd love to have a bigger dick.

I'll go with eyes because my bad vision.

I'm not too sure if this is considered an organ but my spine cause I have scoliosis so if my fucking would spine would just straighten and become normal I could be taller AND not have to worry about getting a surgery for it.

I want to upgrade my stomach so that it doesn't hurt after I eat literally anything.

maybe get an outie belly button

A better heart so that I won't die from all the mukbang videos I do

Either my stomach so it does not get affected regardless of how much I eat or my eyes given my Myopia and up having Super Vision !!!!