Since a number of people have mentioned that Quirk looks good in a dress, I asked KC for an alternate version of the System Shock commission, where he is hacking the Trioptimum Corporation in an outfit of dubious taste, including latex opera gloves and leggings, a rubber dress and red claw varnish.
Admittedly protogens aren't particularly dimorphic so I guess he can get away with it. Even so, I'm not sure whether he's more upset because he's caught breaking into Citadel Station, or because of the way he was dressed at the time.
Of course, this might be why The Hacker doesn't have any legs or feet in System Shock - because they didn't want to have to show a cross-dressing furball.

The original version with slightly more sensible attire and a full explanation can be found here: https://www.furaffinity.net/view/49825812/

This was commissioned from and their version can be found on FA here: https://www.furaffinity.net/view/49821079/