I think he doesn't actually refer to sex or to women. It's rather his attitude to life which from time to time makes him feel helplees and unwilling to do anything - it's his lack of will which we can also find in other songs like "Never let me down again", in which his friend drives (flies) an airplane and in which he likes being driven to places - he has no need to take steps or decisions - he rather lets other people do that for him. No responsibility, no need to be the one who decides (and makes mistakes maybe).
I think he doesn't actually refer to sex or to women. It's rather his attitude to life which from time to time makes him feel helplees and unwilling to do anything - it's his lack of will which we can also find in other songs like "Never let me down again", in which his friend drives (flies) an airplane and in which he likes being driven to places - he has no need to take steps or decisions - he rather lets other people do that for him. No responsibility, no need to be the one who decides (and makes mistakes maybe).