How do babies know

How do babies know if they in there bed or mom and dad bed. My 5 month will be sleep but sometime when I lay her in her crib she will wake 5 min later but if I lay her in my bed she will stay sleep. I’m always like 🤔 how does she knew if she sleep? I don’t let her sleep in my bed for bed time she goes in her crib but I’m always so curious to know like I put you in the crib while sleep you fuss a little I put you in my bed while sleep you are just fine idk ladies maybe in just paying to much attention or over thinking it does anyone else babu do this it do you know how they know the difference?