What part of "fully functional" are you not understanding?

Fully functional.

Noonian Soong cared deeply about verisimilitude.

never forget that canonically Data must have a refillable cum tank, and it's someone's job to refill it.

"No matter how much I twiddle them I still can't pick up Jazz FM"

Positronic debug, those with the belly button as ground, create a kinda uart.

The space cold makes his nipples go pointy, so he can use them as telescopic antennae to transmit data back to Enterprise.

Thermometers

You've got to recharge him somehow..

They assist with detective work

How much do you want to bet Data could lactate in emergency situations.

SO HE CAn excrete bio-lubricants for his machine parts to an offspring who needs it.

Maybe Data doesn't, but Brent Spiner does, so Spiner's portrayal of Data was less than perfect (through no fault of his own).

Like how Michael Dorn isn't really a Klingon, he's just a man who portrays one.

Cue the lo-res Geordi LaForge version of the Drake meme.

Has? Or is Data like data wrt plural

Hell I don’t even know why I have nipples…