Not about me or DH 
, but the result of a conversation DH and I had last night which raised some interesting ideas.
DH & I have started watching the series "Homeland". For those who haven't seen it, the (very) basic premise, is that a US marine soldier is found after being a terrorist POW captive for 8 years. He goes back to the USA and a female CIA officer believes that he has been turned by the terrorists into a double agent and is plotting a terror attack on the USA. Through one thing and another (long complicated plot), the soldier is put into a situation where he has to have a CIA lie detector test.
Now, whilst this soldier was away missing in action, his wife was sleeping with his best friend back in the USA. The day before the soldier is due to have the lie detector test, he finds out his wife has been sleeping with his best friend for the 8 years he is away. Through one thing and another as a result of finding out about the "affair", the soldier ends up getting drunk and shagging the female CIA officer the night before he takes the lie detector test. (i.e. the night he found out his wife was shagging his best friend).
At the lie detector test, the soldier is asked whether or not he has cheated on his wife. He says "No". The lie detector says he is telling the truth as his heart rate didn't rise.
My argument was that he could answer "No" as the truth in the lie detector test, because in his mind he wasn't cheating (not my personal view, BTW), because his wife had broken his marriage vows by shagging someone else first, therefore it was "OK" for him to do it because they didn't have a marriage - she'd cheated.
My DH says that yes he did cheat, because he was still married and regardless of the fact his wife had shagged someone else, he was married and you don't "cheat" on your partner and the lie detector test was wrong - he'd found a way of managing to answer the question without the heart rate raising.
Obviously, this whole question is central to the plot of the series, because it throws doubt on all the other questions asked in the lie detector test and hence the storyline/plot IYSWIM, but as question, what do the collective of MN think?