1) Time-stamping: Optimizing precious moments with a lover is a balancing act, so he’s counting minutes. “It won’t raise any red flags if I’m home by 6:00 p.m. on the dot,” he rationalizes. Or, “If I call her every day at noon, she won’t get suspicious.” He’s drawing timelines in the sand — and being uncharacteristically prompt or oddly ritualized with his schedule may be one way he does that.
2) New lingo: A friend of mine’s suspicions grew when he heard his wife irritably yell, “Good Christ!” — an expression neither one of them had ever used — and one she typically would find offensive. If she’s spending enough time with her lover, she’s sure to pick up some of his/her expressions.