Answer
Because they have no-body to go with.

Question
How can you physically stand behind your friend as he physically stands behind you?

OMG THIS IS THE LAST RIDDLE OF THE BOOK
THANK YOU ALL SO MUCH
BLESS YOUR SOULSSSSSS
🌺❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️🌺❤️❤️❤️❤️🌺❤️🌺❤️🌺❤️🌺❤️❤️❤️