Well, first they spent way too much money on that fancy new Mustang that was priced far beyond their means as young workers with college loans to pay off so that they can look cool and get the ladies. So they sit in it so they don't feel like they have wasted their money and so that one of the ladies will see them and think, "Wow, he has a cool car. I'm going to let him bone me right here and now." I prefer to use the Joey Tribbiani method: stand around on the street wearing a Porsche jacket, Porsche hat, Porsche gloves, and Porsche fanny pack and say, "How you doin'?" to all the ladies.
Second, they have to plug their almighty phone in to both charge it after screwing around with online games all day while they were supposed to be working and so they can listen to their 10,000,000 songs they downloaded off the internet on the expensive Bose stereo system they installed in their car. Listening to the music straight off the phone would be, as my generation used to say, "uncivilized."