I don’t and a huge amount of light comes in at this time of year, so I wake early etc. Seems dumb but it had never really occurred to me I could get thicker ones until my mum was visiting and mentioned in passing ‘oh we have lining on ours’. I guess the advantage of having thin ones is I can draw them when the light gets strong mid-afternoon and still have a decent amount of light in the room. But I wonder if I would sleep better with lining. What do you have in your room?
YABU - I have thick curtains with lining that properly block out the light so I don’t wake at 5am in summer
YANBU - I have thin curtains without lining and in summer a lot of light comes in