A pair of lifts take me each day to my office on the 8th floor (sometimes I walk, but I must admit it's not often, 8 floors seems like nothing at the bottom but by the 5th you're thinking 'three more floors? three more floors!' So I tend to take the lazy option, rubbish I know.)
Anyway... today I realised that one lift is a girl and the other a boy! So I went in some other lifts in the university and it's the same there too!
Is this a world wide phenomenon?