365KiB, 1920x1280, Human_eye_with_blood_vessels.jpg View SameGoogleiqdbSauceNAO Anonymous Fri 11 Sep 14:48:22 2020 No.12108493 ViewReplyOriginalReport Quoted By: >>12108502 >>12109279 >>12109289 >>12109308 >>12109315 >>12109360 >>12109391 >>12109431 >>12109584 >>12110965 >>12110981 >>12111062 why do we close our eyes to sleep, but none of the other 4 senses?