Is it genetic or upbringing?

[Sarcany]

PeterB wrote:
You guys are killing me. OK, how about mycoplasma then? No nervous system, and typically parasitic and a major pest if you're trying to do cell culture.

Are we ignoring saprotrophs?

Yeah, I think you might have nailed it. He's got a shockingly strong resemblance to ureaplasma.