
As/whenever, etc. the fancy takes you
Spontaneity
This phrase suggests an action taken on a whim without planning.

I bought those shoes just as the fancy took me.
Frequency
Implies no time restriction, action can happen often or rarely.

He visits his hometown whenever the fancy takes him.
Informal
Best used in casual conversations rather than formal or academic writing.

Call me up to hang out as the fancy takes you.
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