I was just in DH's ebay watchlist (for innocent reasons) and saw he had put some secret cameras in there. If this was your DH, what would you think he was thinking of getting one for?
It's made by stomach churn as he has a weakness for suspicion and jelousy (I've never given him a whisper of a reason to be). It's been an issue in the past but he's acknowledged it as his problem and worked really hard to elimate it, to the extent that I haven't even thought about it for while.
I can't think of any work related reason. I thought about driving, but then he'd have searched for a dash-cam, not secret camera. I will ask him and he may come out with something quite logical but wanted to get some opinions.