Because he knows himself pretty well, he's fairly sure what she thinks she's getting: some rush pic. And because of that, he's going to prove her wrong. Prepare yourself, Pidgey, because you're getting a pic that is anything but blurry.

see?
no khakis.

Instead what she'll get is clear and in-focus proof that he's very much not wearing khakis. The photo has been taken straight down, held right at collarbone height so the angle is a little awkward, but it's all pale skin with short red and black boxer briefs that don't blatantly show off anything but don't exactly hide either. Congrats Pidge, whether you ever wanted the image of Keith in his underwear seared into your head or not, you just got it.