Either you're infatuated with them, or they get on your 'wick'.
I used to have dreams about one of my female colleagues, interspersed with visions of one of my managers - jumped-up little runt that he was. He's still putting himself about with one of my mates that I see once a month in the City near where I worked for Royal Mail until five years ago.
Every so often their places were taken by a pair of colleagues I'd normally have gone a mile out of my way to avoid, but couldn't. One was with me on the night shift who did s*d all and let others do the work for him. The other was a downright p**s taker who used to be drafted onto my machine when he did overtime and I was on lates.
Between them they helped make my decision to take early retirement!