The 50-50 is a very mutual and sexual act performed by two people. To perform the "50-50" you will need to have
a tub of
Nutella and an anus.
Scoop out a reasonable amount of Nutella onto the finger and insert into the anus. Allow 5 minutes rest and then with your tongue, lick inside the anus. There is a "50-50" chance that poo or Nutella will come out.
"Hey mum, can I 50-50 with the
Nutella this week?"
"Hey babe, I was
wondering if I can 50-50 you tonight?"
"The last time I
50-50'd someone I got poo on my tongue!"
"I'm not too hungry tonight. I might just have a 50-50."