“Why can’t cars play football?”/“Because they only have one boot.”

A UK riddle about football (soccer) is:
 
Q: Why can’t cars play football?
A: Because they only have one boot.
 
A car’s “boot” is its “trunk” (US). A person’s boot is the foot. The joke has been cited in print since at least 1999.
 
           
17 January 1999, News of the World (London, UK), “Funny old game” by Rory McGrath, pg. 73:
WHY are cars so awful at playing football? Because they only have one boot.
       
Google Groups: alt.happy.valley
One for f**tie fans 😉)
§ireßird
1/14/02
Why can’t cars play f**tb*ll?
Because they only have one boot!
 
31 March 2005, Evening Chronicle (Newcastle-upon-Tyne, UK), “Pop the question?,” pg. 40:
Q. Why can cars not play football?
A. Because they have only one boot.
 
19 October 2002, Evening Mail (Birmingham, UK), “You’re Joking,” pg. 33:
Why can’t cars play football? Because they only have one boot each!
   
Twitter
Michelle Fincham
@playfulchild
Why can’t cars play football? because they only have one boot :o)
2:37 PM - 8 Feb 2010
 
25 February 2018, The Daily Telegraph (Surry Hills, New South Wales), “Laugh till your face hurts,” pg. 3:
Q: Why can’t cars play soccer?
A: Because they only have one boot!
   
Twitter
Cars45
@cars45ng
Why can’t cars play football?
Because they have only one boot
#Cars45DryJokesWednesday
#DryJokesWednesday
#Football
#WorldCup
#FifaWorldCup
#InstaWorldCup
#Cars45
5:15 AM - 13 Jun 2018
 
Twitter
BookMyGarage
@book_my_garage
Replying to @ClickDealerLTD @CWMMOTORS and 9 others
Why can’t cars play football?...
Because they only have one boot
#TellAnOldJokeDay #TwitterCarClub 🤣🚗👍🏽
7:02 AM - 24 Jul 2018