[The question, coupled with the bizarre, clearly otherworldly physicality, is enough to make Rex break out into a mirthy chuckle. There's so much texture to the sound of it, it may be hard to believe that he and Shinichi are actually around the same age. Coupled with the staggeringly angular, muscular physique and costume that seems to only highly the razor-sharp squareness of his jaw, it's unsurprising that onlookers who don't know any better often mistake Rex for an actual adult- That is, until he opens his immature mouth.]

What, so you haven't seen his?

[Rex quirks a well-manicured eyebrow upwards behind a pair of orange goggles. He addresses Migi in a calm and collected manner, as this is far from the strangest thing he's ever seen, clearly a lot more interested in the freaky limb than its tepid host, who he's quickly decided is a bit of a bore.]

Then again, with the way this shitstain's yammerin' on, I wouldn't be surprised if his junk was inverted.

Or maybe it's so teeny-tiny, ya just about missed it.

[It helps that Migi shares so many traits with one of the few close friends Rex has ever had, right down to the robotic voice and hilariously overly-analytical questioning.]

You two don't shower together? You seem pretty permanently... Attached.