I agree, 68F is the perfect night temperature. 77 is a bit too high, at 80 I am sweating even with no sheets. I grew up without AC somewhere where it was regul

I agree, 68F is the perfect night temperature. 77 is a bit too high, at 80 I am sweating even with no sheets. I grew up without AC somewhere where it was regularly over 80 at night and I could never sleep. My sleep greatly improved by moving somewhere with a more mild climate.