You know there's that joke
A guy earns 3 tickets to study bass
He goes there and haves the first class.
He gets home, his father asks: 'What have you learned today?'
'Ah, I learnt the first 4 notes in the first string'
The next day, he goes to school, and when he comes back, his father asks "and today, what have you learned?" "Just the first four notes on the second string".
The third day, after the boy leaves, his father notices he forgot the ticket. When the kid came back, smelling like weed, beer and cigarretes, with lipstick marks all over his neck collar, his father asked "What happened?" and the son answers "I had a gig"