Hmm, I don't understand the first part of your post, or why you think your example of sexuality has anything to do with my previous post.
To answer your question:
Atheism is the belief in the absence or rejection of deities. To get to the basic form of what entails in the atheistic beliefs, atheism means that everything know of in this world and our universe cannot be true or proven true. Our reality and lives do not have any meaning, value, etc. This is what the most basic form of atheism comprises of. A lot of atheists do not realize that their lack of beliefs in a deity entails much more than just the basic lack of belief. Many atheists scramble to use science to back their beliefs, but how can reasoning be done in science without their being a precursor to science and human reasoning. An atheist, with their reasoning and rationality, has to step into the theistic world to “prove” what they believe in, but their actions of reasoning and rationalizing contradict their atheistic beliefs. Anyone living today in the world cannot ever be a full fledged atheist as long as they are able to think. There is not anyway a human can think without there being something before humans and the universe to give us a "gift" of thinking that entails rationality and reasoning. Atheism is impossible because atheists are contradicting in their own "beliefs."
I am 100% atheist which means I am 100% certain that all gods based in theology do not exist. There is zero evidence they exist.
I am not 100% adeist. Deists can make a statements like
god is the universe or
god is the central nervous system with which I cannot argue because there is 100% evidence that the universe and our central nervous systems exist. However, such deists are apostates to every theology on Earth. I don't see the need for deism or theism but that's another issue. Be careful not to conflate theism with deism.
The main problem with your argument Michael is that you conflate two meanings of the word
believe. The general definition of the word
believe is to accept that something is true, but one can believe something is true based on faith which requires no evidence and one can believe something is true based on evidence and reason which does.
So when I say I believe in atomic theory or the germ theory of infectious disease it's not the same as when a person of faith says they believe in a father god named Yahweh or Brahma or Thor or Zeus.
Atheists like me
believe it when we see it--just like Thomas who did not accept as true the resurrection of Jesus until he saw and touched the man he thought was dead. By appearing to his disciples Jesus required zero faith of them but his disciples and the theology they created have required 100% faith from Christians ever since--especially as no one has seen Jesus since. As a child I found that insulting to basic human intelligence and reason.