When we think of carnal pleasures, or pleasures of the flesh, the first thing we think about is sex. Of course there are other pleasures of the flesh, such as eating, drinking, enjoying nature, music, art, conversation... all the pleasures we gain from our physical senses, our body and our mind.
Carnal pleasures are not incompatible with ascension. In fact they can help. However, they are a two edge sword, just like any modality based in the body, mind or spirit.