Hi,
Maybe you mean: "I
muži mají své dny"...this comes from an ad for Fernet (Czech alcohol - spirit).
This means: "Even men have theirs periods".
Actually, it's a pun with a little double meaning, hope you understand what I want to say but considering the object of the ad it's quite clear, no?
And to be precise, the word
múzy means muses as the fairies who give you (or to the poets) an inspiration...
Hope it helps.
D