While incest may be titillating, it's a fringe perversion at best. Cultures, over time, have had varying views on sex with relatives and true, many societies believed that intermixing Royal blood would keep the bloodline true however, in the end it does just the opposite and causes many genetic abnormalities that weaken the bloodline.

It seems that in modern societies incest is defined as having sexual relations with anyone who is closer than a first cousin; the only exception being relatives by marriage or adoption. With that mind, we have determined that to keep our societal genetic mix healthy it's inappropriate, immoral, and unhealthy to engage in incestuous relations.

All that being said, I agree with everyone else that this is no subject to discuss here outside of an intellectual debate. And, sharing stories about incestuous fantasies is completely inappropriate here. My advice, delete this forum topic ASAP.