It is regarded among many as a vile form of behaviour and many proffesionals recommend that one only eats cucummber in private. Not to be shared as a social food or treat. Also watch out for 'Persian Cucumbers' as their smell is much worse.
Stephen: "But all I had was this measely cucumber..."
Jenna: "Eeuw! Haven't you heard of 'Cucumber Breathe'? Sorry babe, but your gonna have to wait for your anniversary present."