Your catgirl can hold a normal human-ish conversation until someone shines a red laser on the wall and then they're fucking Gone, your puppyboy can focus on work until a squirrel goes by outside then he fucking Loses It. While these things may not happen literally in our real lives (though I know some people who would be easily distracted by both), they're representative of what it's like to live with an easily distracted mind, a train of thought that spends more time off the trails than on them. It's cute!