Oh come on, you know that's ridiculous.

[He rolls his eyes, but does take a step back so he's imposing on Crow's space less.]

For all I know, if I told you why you'd just say it more often. I'm just sick of hearin' it, is that a problem for you?

[There's also the fact that he tends to equate being called a pretty boy with being called weak. At least they're not having this conversation when Firo had his real memories and a stronger reason for his dislike of the insult.]