pkpk can't stop sneezing.  People say if you sneeze it's because people are saying something about you.  But what are they saying about pkpk?  You can see right here!
Or she just does it because 
she thinks it's funny,
O "sólo lo hace porque cree que es gracioso
O "sólo lo hace porque cree que es gracioso
"Ela faz isso por 
achar que seja engraçado