“It’s like a paper clip…you have to bend it wrong to make it right” – Andy Steward
An ‘asymptote’ is like a bent paper clip. No matter how many times you push that bent part to its correct position, it will not stay there. It might get less bent, but never totally un-bent. That is until you “bend it wrong”. Until go past the ‘correct’ point. Mathematically into the ‘negative’ area.