WHIM/TO BE AT THE BECK AND CALL

"I can't stand this life; run here and there, bring me a coffee, buy me cigarettes: I'm basically at the whim of my boss!!"
-"Well, It's normal at work to be at the beck and call of somebody.. But listen, if you could turn over a new leaf, what else would you do, as the whim takes you?"
"Hmm, let me think.. purely on a whim, I think I'd take up a belly dance course!"
"I'd rather see you snowed under work than watching your belly floating. You'd have to find yourself a new sexbuddy."
"oooooh, It was just a whim! I am not serious, mate!"

WHIM : a sudden desire or idea, especially one that can not be explained.
TO BE AT THE BECK AND CALL OF SOMEBODY : to be always available to satisfy somebody's needs and do whatever someone's ask.