Cap'n, it's the engines. She just won't take it!

EDIT: But seriously, Kiso. You're doing exercises, followed by half a marathon, followed by weight lifting... and you choose a frilly bra? You can't tell me you don't have a sports bra anywhere...

She's gon' explode!
We're dead for, everyone get out!

Fire in the engine room!

Okay, so we know now that he perceives Kiso to be female.

This leaves the following possibilities.

- He is actively avoiding the issue.

- He is made of tennessine.

- Kiso isn't his type.

I'm putting it on number three.