There are so many kinds of lies and so many reasons to lie, and it seems Ianto has mastered them all. It's sad, though, that he's found it necessary to lie so often, yet at the same time he's always had what seemed like a good reason at the time. It's a bleak way of living though, it means not letting people get too close and by the last one, I think Ianto's resolve is slipping - he won't be able to lie to himself much longer.