There is a story behind this one. One time Black Sen - http://blacksen.deviantart.com/ - drew a picture of his lovely whatever-she-is Rachel Navado that was one of those pictures where other artists add to it to have their characters interacting with the original picture. You know what I mean. I think it was supposed to be for gropings. But I never finished it. Basically Mycroft is in awe, and Vanilla is not pleased about his wandering eyes.

Yup, that's it.