"Fred se brossait la moustache tous les matins."

Translation: Fred used to brush his mustache every morning.

[Make_me_Poly]

This is clearly a reason to break up with him

[AdrianC602]

Every time I think I start to spot a pattern to the gender of nouns, a curve-ball like "la moustache" gets thrown in - just to remind me how random it really is...

[Khristofer_BR]

this is clearly a reference to Queen's lead singer.

[Will256574]

please note;- here in Australia we odopt the French spelling; moustache so in our English classes, mustache would definitely be marked incorrect.
So much for learning to converse dans le Francais du un pays etrange...