Heat receptors - but how do they work?

Objects that are located in one room all have the same temperature. But why do we still feel differences in temperature? The usual room temperature is at around 22°C, our body temperature at 37°C. Our body emits some of its heat to the object that we touch. However, the heat transport is different for different materials. This is the phenomenon that our receptors perceive.
An object with good thermal conduction (e.g. metal) transports the heat throughout the object very quickly. The cold receptors of our skin signalize that our hand emits energy. The object feels cold.
An object with bad thermal conduction (e.g. wood) transports the heat slowly throughout the object very slowly. The contact point nearly takes on room temperature. The receptors of our skin do not perceive any change in temperature over a period of time. The object feels warm.