Because individual IQ may decrease because of illnesses or trauma. However that does not imply that the genes the individual has inherently correlates with low IQ.
The individual's IQ is still a way better predictor of that individual's IQ than group membership.
Why do hypersexual groups need to be hampered? I hate hypersexuality with a passion. That's why I want to destroy hypersexuality.
And you think other people will do what you want just because you want it? You must be retarded. Or an autist.