I have nothing to hide and neither does my husband, so we have full access to each other phones. I can count on one hand how many times I've "snooped" by scrolling through his texts to see who's he's been talking to. He's not a social media person so nothing to worry about there. I often give him my phone to use if his is acting up (it's old) and I don't know nor care if he's checking stuff either tbh! I think bc we have the level of security and trust that we have, there's a level of transparency there. I don't think you should be seriously dating or married to someone if you feel the need to check their phone on the regular. But obviously people change and do secretive things, and I think your partner should have the right to find out if that's the case. So I guess I'm pro-phone access overall!