I was eating dinner the day after Thanksgiving when my two girls began hissing at my apartment door, and I heard a kitten crying in the hallway. I opened the door and saw what I thought was my neighbor's cat (Sebastian looked exactly like that cat, only larger), so I picked him up and asked him what he was doing in the hallway. Mike heard the commotion from his apartment one floor down, and, since he had a spare bedroom, offered to keep the kitten until the neighbor returned home from work. Well, it turned out that Obi, the neighbor's kitten, was safe in her apartment the whole time, and since no one claimed the newcomer, Mike adopted him and named him Sebastian (after the Miami U mascot). Although Sebastian and Mike's 7-year-old female cat, Baby, did not get along, Mike kept trying to work things out between them.
Sadly, Baby was diagnosed with terminal stomach cancer in April, and Mike was devastated, but did his best to keep Baby comfortable and happy for her last few weeks. He was so strong for her at the end, staying up and holding her the entire last night before her final trip to the vet, that no one could doubt how deep his feelings were (and still are) for her. Her illness and death are the only reasons I've ever seen him cry.
Since then, Mike adopted a feral kitten in need of a forever home (Sophie), who has been a great comfort to and companion for Sebastian, and we have combined cat families and households. He treats both my cats as if they were his own, pulling more than his weight in litterbox policing, medicating, treat-giving and nail-grooming for all four.
Perhaps the most obvious (and cutest - sorry, Mike!) evidence of his love for cats is the way he unashamedly sings to them, cuddles them, talks to (and with) them, plays with them and is careful to ensure their safety and well being in every way he can, no matter how excessive it might seem to a non-cat lover. The cats trust him completely and love him wholeheartedly, which may be the most convincing evidence of all.