[Sundae]

I lock the doors from the inside during the day when my parents are away.
I might be listening to music, in the shower, drying my hair, watching something online upstairs. So it makes me feel safer. Frm random visitors.

We always lock ourselves in at night, but with a key in the door, in case of a fire.
When I'm alone at night I not only lock myself in and keep the key in the door, but also put the chain on. This is to help me sleep, because there are a number of friends and family members who have a key, and I worry they might come snooping after me. Nonsense because firstly it's never happened and secondly because if the doors are locked and the key left in, no-one can use their keys to get in. But my sister regularly lets herself in when my parents are here, and I often wake up hearing various people say my name when I'm alone.

But weirdly, I'm actually much more cavalier about burglars.
I'll regularly "nip out" without locking the doors if I can't immediately put my hands on my keys. I've even been to work before without locking the back door, because I didn't want to make myself late. Then again, it's a right assault course getting to the back door from anywhere other than the front door.

And we're surrounded by houses, with neighbours who keep an eye on us, especially if they know Mum & Dad are away. So it's spookiness regarding friends and family and sanguine lack of worry regarding crime.

FTR I've been this way all my life.
The first house I lived in, I regularly climbed in the large, deliberately unlocked front window rather than search out my keys.
I never used to leave the deadlock on when I lived in London so I could reach through the letterbox and lift the latch.
And I pretty much never locked the front door of my flat in Leicester unless I was inside. I'd also always put the front door of the building on the latch if I knew I'd be out for less than an hour, and all day if I knew the old lady upstairs was away.