>>Anyways, the scientific world generally assumes that ones sexual orientation is mainly determined before birth.
>>
>>From: http://en.wikipedia.org/wiki/Sexual_orientation
>>
>>Sexual preference may also suggest a degree of voluntary choice,[9][11][12] whereas the scientific consensus is that sexual orientation is not a choice.[13][14][15]
>
>Consensus in science? They had an assembly and voted 100% for it?
>
>Whenever I see "scientific consensus" my doubts rise. It sounds so much like "anyone who disagrees won't get his research funded and no tenure either".
>
>Proof. Science has proof. Or doesn't, in which case it says "we still don't know".
>
>What's next, vote to revoke Newton's laws?

In fact everything in science is a consensus. Scientific facts are only valid until proven otherwise, upon which the facts are redefined.