Why is the goat there  not me?
 
There are a few reasons why he took his goat pet for a ride instead of a female companion:
1) It doesn �t wear a ton of stinky parfume
2) It doesn �t  talk too much and doesn �t complain
3)It �s tamed and  obedient
 4)It doesn �t want to stop and shop all the time
5)It becomes  a tasty  roast when he gets hungry. 
   
 Why don �t you add some more funny reasons ?
 
(As for number 5),  I didn�t mean to offend anybody,It �s just a joke. I am a vegetarian.)