What are carnal pleasures?
The word "fleshly" means - associated with the flesh, with the body.
That is, the combination "pleasures of the flesh" means something that serves to satisfy desires that are caused by the needs of the human body.
Usually this combination denotes love joys. The designation of satisfying human gastronomic needs also suggests itself. Of course, sex and food remain the most pressing needs from century to century.
It is that which gives pleasure to the body, the physical component of pleasure that arises from sense perception. Usually, carnal pleasures mean food and sex, the desire to live comfortably.