Blonde
A young man presents his fiancee to his parent.
At the table, the girl needs to have a fart. 
After a couple of minutes they can feel a smell... 
The father-in-law says: Rex...!
Happy that her future father-in-law blamed the dog under her chair, the girl relaxes. 
After a while she gives another and the father-in-law says very angry:
Rex, be careful...
With a very big relief, the girl farts again. 
Father-in-law says:
Rex! 
Get out of there she’ll shit on you!
                                
                                
                                
                             
                     
                        