My ex used to do this too... but that was probably because (a) he was absolutely exhausted after a seriously stressful job and (b) he found watching the idiot box (ie the tv) after such a day a total switch off... hence the snoozes. However, if we had dinner at the dining table and continued to chat to each other, listen to music, play games etc, he would be fine ! In other words, it was the combination of a very hectic day followed by the brain being switched into zombie mode that led to the eyes glazing over ! (He was fine if we were watching interesting documentaries, the news, etc etc, it was watching soaps, light comedies, silly stuff etc that did it for him, poor sod !)