It probably says a lot about his friends that the iguana was easier, since they're not the simplest pet to have. But animals generally have pretty straight-forward agendas, they're not as emotionally complicated.

"Iggy. Yeah, yeah, I know, very original," he answers with a smile, before she can point it out. "But he, uh, he died a while before he came here." (Let's not get into how that happened.) "Haven't had a pet since then, for various reasons." (Like being locked up for three months.) "Been wondering if I should change that, though."