DH recently seems to be attached to his mobile phone.
We have a bowl for stuff on the sideboard in the hallway, usually he would dump keys, phone, wallet, loose change, etc in there, but lately I've noticed the phone stays in his pocket.
He works nightshifts occasionally, and he usually goes to bed when the kids do for a couple of hours before getting up for work, then sleeps for 5 or 6 hours the following day while they're at school. The phone has always been left in the bowl in the hall, but the last few times the phone has been taken upstairs to bed with him.
He worked last night, and took the phone up to bed with him to "charge". I asked him why he was charging it upstairs (we usually charge them in the kitchen) he said it was because he "didn't want the cat to pee on it", now we do have an elderly cat who has occasionally missed the litter tray but she's never shown a preference for peeing on mobile phones before 
This morning he came in, went up to bed, noticed the keys/wallet/etc minus the phone in the bowl and assumed it was strapped in his pocket again
Grabbed a load of washing, including his work stuff, checked pockets as he's notoriously bad at emptying them half expecting to find the phone. It wasn't in there, nor was it laying around our room anywhere so he must have tucked it away - but why?
I'm trying to rack my brains as to whether he could be up to anything, and I just don't think he's got the opportunity
We have had history of texting before, so I don't know if that's clouding my judgement, or I'm just seeing the signs earlier than I did last time iyswim