Dinner time:
                              Me: *sits down to eat and starts eating*
                              After a while:
                              Me: I need water. 
*extends hand toward the jug and brings it close*
*looks at my mug half filled with water*
I guess that water is not clean. But the place to clean it is too far. 
*looks behind at the cleaning place just behind the chair*
Sigh... 
*pours that water in big bro's mug, then again does it*
*then drinks from my mug*
                              Big bro: *comes and drinks water placed in a mug beside me*
                              Me: *looks at my mug*
Huh? If my mug is full, then the one he just drank is... 
*looks at the empty mug where I poured the probably-unclean water*
*facepalms*
I don't think that water was clean. 
                              Big bro: Then why did you keep unclean water in it? 
                              Me: Σ( ̄□ ̄)!
You've gotta be kidding me. How did he know it was me? 
                                      
                                          
                                   
                                              
                                           
                                               
                                                  