Mike gasped at the pattern he recognized reflected in the water. He was a calico cat, and he remembered from Bio Class that calicos are always female because the genes controling the color pattern are x chromosomes (orange and black). He hoped he was mistaken, but Mike remembered because he'd missed it on the exam and had gotten a B instead of an A. The male would have been solid orange or solid black, perhaps with white spots or markings. He looked between his legs, and saw that he lacked male equipment.
Mike looked back into the lake, but this time he saw two cat faces. A calico and a solid black cat with white feet. The one he'd shared some fish with last night. He named it Tom because it was male. Tom mounted Mike, his strong paws holding Mike's hips tight. Mike didn't know what to do, and he felt a sudden pain and pleasure and Tom penetrated him.