History repeats

It was actually XT-15 that started drawing on the next clone, he had a bit of a rebellious phase in the vat he never quite grew out of.

He just told 16 that it was tradition and his just faded over time. It's not like the guy fresh out of the jar knows tattoos are permanent... Yet.

Maybe XT-1 woke up with tattoos like this, but it said Dave the lab tech was here, and Dave was the only one to enjoy it.

Or a divergent xt started doing this shit and it seems like a tradition

We have to ask why a tattoo machine, ink, needles, and operating instructions were even put on the ship to begin with. My guess is that the progenitor of the clones is the biggest dick of all.

Depends on how souls actually work at a quantum level, some people, like NDGT, believe they don't exist.

but if they do then there could be replicant drift from one generation to the next.

Hell honestly, you might not need something as profound as a soul to observe a replicant drift over time throughout a lineage. No matter how identical they are, 2 clones will have different life experiences ranging from things as minor as seeing events from 2 physically different locations in time or space up to something as major as experiencing important life events differently. I don't believe it's possible to stay the exact same when there's so many differences in one life lived to another.

I bet xt prime wouldn't even recognize himself in xt 24.

How do we know that XT models were the only models?

Who cares if they're exactly the same out of the vat, their experiences after emerging won't be, and they'll mature into different individuals.

I <3 cock is a positive message.