I leave my phone lying around, no security on it whatsoever, leave Facebook, my email, everything logged in on my laptop. My partner of 15 years (lived together for 7) is the same. We're in our early 30s.

I certainly have never had the urge to go through her stuff and I don't believe (although to be fair it's not something we've discussed) she's ever looked at mine either. As well as being a couple we're both individuals with our own lives and dealings and interests, and to be breathing down each others' necks 24/7 would imply a massive lack of trust. I genuinely don't get why being in a relationship should mean giving up privacy and personal space - it seems incredibly unhealthy to me.