When you slightly apply a thick coat of peanut butter around your penis then gently place saltine crackers and spread them over the tip and bottom of your cock sandwiching them and spread jelly lightly on a girls outter pussy lips .
Thrusting your saltine coated cock inside her mashing the saltines as you sing and chant the peanut butter jelly song thrusting at the pace of the song
If you don't have peanut butter you can always substitute with nutella only you have to sing chocolate rain instead .