That's Melissa in my icon. She was my last rat, and she was lonely once her cage mate died. I tried to give her more attention to make up for it, and let her roam about inside my shirt and perch on my neck and shoulders, under my hair, while I worked.
Missy was the only albino of the seven pet rats I had. (The others were four black hoodeds, a beige hooded, and an agouti.) She was the only one who had a curious habit I had never heard of before, and that I learned is confined mainly to albino rats (pink-eyed whites or PEWs as fanciers call them): she swayed. She would rise to her hind legs, front legs extended before her, and move from side to side. This turned out to be because albino rats have even worse vision than pigmented rats, and are very nearly blind; they sway in an attempt to boost their vision by using parallax to gauge the relative distance of objects. That's science's best guess, anyway. I preferred (and still prefer) to think that Melissa was worshiping some rat god.