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1) Being an engineer myself, I can understand how unaccountable things can be taboo and unthinkable. Like not being able to work out why the two space craft Pioneer 10 and 11 launched by NASA are not where they are supposed to be. 

"These missions, launched in 1972 and 1973, have covered hundreds of millions of kilometers, heading toward the edge of our solar system. But something is holding them back. Each year, they fall behind in their projected travel by about 5,000 kilometers (3,000 miles)." 

OMG!

2) And do you know that approx. 2,000 years ago, Pompeii, Italy has brothels that promote both straight and gay sex? Well it just doesn't seem like sex trade and sexual preference is a problem back then, why now?

3) It scares me sometime to think that I behave like me because I am; like a pigeon that dance the dance during mating season, and knowing how to knit a nest without seeing one being done before - it's all hard wired, being another specie on earth, albeit the most dominant specie. Depressing? Read item 11. Free Will - Your Decisions Are Not Your Own.