Two students passing notes and it escalates fast

A back-and-forth note exchange written in green marker on graph paper:

A: 'Hey, why?'

B: 'Because I like you'

A: 'Huh?'

B: 'Thighs. Just touch them.'

A: 'You crazy b*tch —'

B: '— while sitting next to me'

The punchline is a classic cut-off setup: it looks like a creepy confession, then the last line reveals they just wanted their thigh touched while sitting nearby (like a playful tap). The dramatic 'you crazy b*tch' reaction makes it.