<P> After his initial appearance , the character of Chachi was expanded to a recurring character due to positive reception by fans , with Baio receiving up to 5,000 fan letters a week . When the writers began developing the character of Chachi as a musician , Baio was against the idea because he `` did n't sing , '' but changed his mind based on the possibility of the fame associated with becoming a pop singer . His early catchphrase `` Wah , wah , wah ! '' became popular with teenage girls . However , an attempt to spark a fashion trend by having Chachi frequently costumed with a bandana tied around his pant leg did not catch on . </P>
<P> After his initial appearance , the character of Chachi was expanded to a recurring character due to positive reception by fans , with Baio receiving up to 5,000 fan letters a week . When the writers began developing the character of Chachi as a musician , Baio was against the idea because he `` did n't sing , '' but changed his mind based on the possibility of the fame associated with becoming a pop singer . His early catchphrase `` Wah , wah , wah ! '' became popular with teenage girls . However , an attempt to spark a fashion trend by having Chachi frequently costumed with a bandana tied around his pant leg did not catch on . </P>
why does chachi wear a bandana on his leg
why does chachi wear a bandana on his leg
an attempt to spark a fashion trend
an attempt to spark a fashion trend