Is incest normal?

I was going through some websites and I came across "Is it normal?" website. I searched for topic Incest and pretty good results pop out and became confusing to come to conclusion that is incest normal?

Having sex with close family members is a crime? I think its very normal to get such feelings being a human.

A man and women have right to build a sexual relationship if they find it suitable. I believe that even in current century we find many people who keep incest relations and they seem to be very happy about it. Having sex with mother, sister, daughter or any family member may drag you even more close.