How to go reindeer humping:
1. Wait for the cover of nighttime
2. Drive around your neighborhood in search of decorative reindeers on lawns
3. Once you spot 2 or more reindeer, ensure that the coast is clear
4. Exit your vehicle stealthily
5. Affix one reindeer to the back of the other "doggy-style"
6. Step back to admire your work and giggle if desired