joydogging
Stealing (scrumping for) cars with the express purpose of fornicating in them for the sheer thrill.
"Me and my girlfriend went joydogging last night. It was immense."
"My car was stolen by joydoggers. Luckily the police found it, caught the perpetrators and they paid to have the velour cleaned."
"My car was stolen by joydoggers. Luckily the police found it, caught the perpetrators and they paid to have the velour cleaned."