Honestly?

Easily the mouth.

My spine, it's not in the best shape.

Weenus.

Balls, like why do I need them and why are they hanging so low, wrinkly and gross😆

the duodenum

I think the mouth is very rude

Spleen.. appendix. Vestigial organs are just ick. Kidding.. BUTTS. Butts are gross.

I'm a nurse. I have tolerance for them all.

The gooch I guess. Though I'm sure any body part that should be on the inside which is on the outside would freak me out more :o

I've seen from afar and near- no tide as swift as time, as change grows near. As all long roads whirl onto unforseen paths, change gives no haste. All giveth takes time, in exchange one ailment for another and so forth. Perfection seem not clear until all is said and has disappeared. (Sorry about my poetic rant, I wrote this so long ago but never clicked answer)

my black hole anus

Nothing.

the body hair.