"Should we be eating this many onions?" 9-Volt burped since he was starting to feel bloated. "I don't think I could continue-"

"Oh come on son." Shrek pointed out while shaking his head in disappointment. "You should know that they have layers like us ogres do!"

"That's right dear!" 5-Volt added on while farting due to letting the onion layers do their work on her body. "You just have to feel it all go through you!"