Each of us is cousins with every other one of us – and to all the animals and plants and other organisms, of course.
The trick is being able to name the exact relationship. If you can work out the links, I guess you feel a closer connection than you would otherwise.
Sometimes I try and tell my cat that her nth-great-grandmother was my mth-great grandmother, but she doesn’t seem to care. Possibly because I don’t know the values for n and m.