How we relate to the corporeal body is critical in Buddhism. Sex, for example, is not the problem so much as the love of sex is the problem: the frequent need to engage in it. It is the same with eating. It is our love of food that is the problem which leads to gluttony. In other words, the big problem with our corporeal body is our overindulgence in it.
With our overindulgence in the corporeal body our spiritual life is put on hold. Our love or preference is not for the spiritual but love for a bowl of Ben & Jerry's ice cream or a slice of pizza. These many moments of indulgence add up to a growing love for the corporeal and much less love for the spiritual which we are trying to realize.
Those who are serious about Buddhism first understand that they must give up their love for the corporeal while turning their mind to the spiritual hoping to realize spirit, directly. This sounds simple enough but is it? It almost goes without saying but serving the needs of the corporeal and being on the path to spiritual intuition do not often agree. In fact, there is a great deal of conflict between them.
No matter how ideal our words are they can't erase the fact that we live in a world primarily based on Darwinian fitness. Nor should we draw from this as biological creatures that we see reality the way it really is.
The data that we receive through our senses only relates to the creature and its survival and whether it will be successful at reproducing its kind. But for those on the spiritual path this is not their goal. Their goal is to Intuit absolute spirit, the very substance of the universe. This leads to seeing the universe the way it really is which is an illusory composition as far as appearance is concerned.