Friend 1 messages Friend 2 to say they have a spare ticket to the cinema. Their partner is too busy with work to come, and other friends can't go so they ask if Friend 2 will go with them. Friend 1 is aware that Friend 2 doesn't like the genre of the film (and hasn't seen the first one in the series), but Friend 2 agrees to come.
Both Friends have similar amounts of disposable income. Each ticket costs £7.50.
Would you expect Friend 1 to pay for both, or for Friend 2 to reimburse Friend 1 the cost of their ticket?