Better late than never, right?
Let me call this for future reference:
A few seasons ago, it was ear cleaning (Hen Zemi). Last season, it was toothbrushing (Nisemonogatari). This season, it’s drool licking (Nazo no Kanojo X). So logically speaking, nose picking must be next!
If a guy or a girl happens to romantically or sexually pick the nose of someone of the opposite sex in an anime coming to a near future, everyone who read this and who blog such an anime must quote me as a great genius.