Although after posting that you could look at it from another angle because the song sounds quite happy and upbeat. It could be that the song is in fact about a one off chance for a night with a forward woman making some sort of unbelievable proposition of which he accepts and decides to go home with the woman, once at her home realising that's the kind of woman she is and has probably done it time and time again but just get on with it and enjoy it, sing another fucking shalalala
Although after posting that you could look at it from another angle because the song sounds quite happy and upbeat. It could be that the song is in fact about a one off chance for a night with a forward woman making some sort of unbelievable proposition of which he accepts and decides to go home with the woman, once at her home realising that's the kind of woman she is and has probably done it time and time again but just get on with it and enjoy it, sing another fucking shalalala