you go alone eating hamburgers, then nobody can blame you that your friends are eating junk food

mcdonalds sells big mac 

burger king sells whopper

if everyone likes big mac, 

but you like whopper, 

you don't convince your friends, family and collegues to try whopper 

because you don't want your friends, family and collegues to get into trouble because of you, so you keep your taste to yourself and go alone 

you go yourself, alone to burger king and eat a whopper 

and maybe you meet a new friend that also likes a whopper 

maybe your friends, family and collegues walked by burger king and saw you eating a whopper and it looked nice 

now maybe your friends, family and collegues will go to burger king and eat whoppers 

and if they come to burger king, you can meet them there and tell each other that you like whoppers