Yes, there are Chakras....do a bit of research.....some snippets:
Chakra is a Sanskrit word meaning wheel, or vortex.
The idea of the subtle vital force (prana) and the channels along which it flows (nadis) appear in the earliest Upanishads (7th-8th century b.c.e.). The heart was said to be the centre of the 72,000 nadis or subtle channels, and the place into which the senses are withdrawn during sleep. As with many ancient civilisations (e.g. Egypt, Homeric Greece), the heart was also considered the seat of waking consciousness.
But it was only in the later Upanishads - the earlier of which were composed somewhere between the 2nd century b.c.e. and the 2nd century c.e. - reference is first made to basic Tantric concepts such as chakras, mantras, and so on.
Tantric Buddhism (or Vajrayana) broke off from the Indian Tantric one at a very early stage. Hence they developed a rather different version of the chakras. Tibetan Buddhism acknowledges four (navel, heart, throat, and head), five, seven, or even ten chakras or "channel wheels"; each with a different number of "spokes" to its Indian Tantric counterpart. The navel chakra for example has sixty-four spokes, the heart chakra eight, the throat sixteen (the only one to agree with the Hindu scheme), and the head or crown chakra thirty-two.
And yes, there have been various "new-age" interpretations, most of which are crap....but the basic idea of Chakra existed long before the idea became "popular".
Of course there is such a thing as Sacred Sex. Sex IS Sacred. That idea, too, has existed for centuries. And Tantra simply refers to the Divine Union of Opposites. Of course now, something like this just debases the sacredness and makes me ill. http://www.sacredsexyes.com/
Just because some so-called "new-ager" has bent and twisted some of these terms and uses them improperly does not mean that they do not exist, or that they are not still valid within the original teachings.
You can't deny the existance of things just because you do not understand them.