I get in trouble for this shit all the time by some people. Really annoys me. I'm not lying to you if you didn't ask me a question pertaining a certain fact. If there isn't anything going on with the ex and the individual in the relationship, they really could just be friends, resulting in "I stopped by a friends house to chat" not having a lie, nor implicating any reason to withhold information. There are trust issues in the relationship if you think your SO will cheat on you when out with someone else. Of course they could cheat, but anyone could cheat. The point of a relationship is that they aren't going to do something terrible like that in the first place. I'm ADHD and sometimes my answers to questions will focus on certain facts. Say I was asked about my day, I may mention just a few items that come to me, work, certain annoying driving story, funny thought I had to day, etc. I may not mention I had lunch with so and so, just like I may not mention I had french toast for breakfast. It doesn't need to be mentioned if it wasn't asked about or may not matter to you (or to them). Even if I know that mentioning something I did could upset an SO, if I did nothing wrong I feel no need to discuss it. Why am I going to waste time getting yelled at because I ate lunch with some chick I dated 5 years ago and didn't cheat on during the lunch, if I know I will get yelled at. It doesn't hold relevance to her, so no reason to tell her, and her being irrational about something isn't a reason to tell someone an irrelevant story. I even sometimes just don't think of something untill later when I think about it. When first asked, I may not automatically think of the potential piece of info that could be told. I've gotten yelled at by a girl for telling her later I took an opiate yesterday, when I was never asked about it, I was never told I could enjoy the occasional opiate (especially if they use recreational opiates too).
"why didn't you tell me yesterday?"
"I didnt' think about it, nor was I asked. I'm telling you now because I was interested if you wanted a small amount of it, chill out."
"You still lied to me because I didn't know you were high yesterday"
"You didn't ask, so it can be a lie. Also why am I offering some to you if I did 'lie' about it". It was silly jealous BS.
I make it a point to not care about opposite sex friends, spending time in situations were bad things good happen if they choose to be bad (clearly I shouldn't be with them, not they shouldn't have hung out with that individual), etc. I tell SOs, if you feel I may get upset because of jealousy/a stupid illogical reason and doesn't have to do with me, dont' tell me. If you find some dude that come in your work today is real attractive and you had a good conversation with them why do I want to know? Why would you even tell me. If we are together the point is neither of use will cheat. Or thats what we assume because there should be trust.
People need their own privacy. I hate how social networking has turned the the world into a silly, jealous, waste of time, annoying indoctrination of weird social "protocol", etc. I don't care about 95% of the features or reasons for facebook. I don't like the silly image it portrays a person (limited way that can be interpreted in one way by some viewer), I don't like wasting time reading about something you're going to tell me later (besides articles, music, or items we can discuss, basically were it can be use intellectually in person. Your stupid dog taking a shit on the carpet maybe a kinda funny story if told to me, so why am I reading about it first online, resulting in me hearing about something I only need to hear once, notably through a better medium). Fuck if I use facebook again, let alone give it to (if I make one) a girl who I'm interested in.