I sometimes buy domain names on my phone, late at night, in my bed. Usually after hours of laying in bed building out a business in my mind and iterating over and over to see where it leads. Buying the domain name seems to be the last step in the processes, it helps me sleep.
I look at the list of my domains every once in a while and pick ideas to work on, but sometimes I have no idea what drove me to buy them, like parttimehuman.tips