you don't addresss the logical flaws of utilitatrian arguements. You make a very flawed pass at addressing the science based claims - but you dramatically fail on those:

• Genetics - skin cells have been shown to be pluripotent and have a full chromosonal set. You slough skin cells- both living and dead, every night (actually all the time) - so using your chromosonal arguement, your bed is full of independent human beings.
• Your interdependence with your children is an emotional construct. There is nothing that precludes you, other than personal emotional attachement, from walking into a lawyers office in the next hour and signing papers that renounce your parental rights and obligations to those persons. As Wards of The State, they have no connection to you any longer.

So I'm still waiting for the LOGICAL flaws in the utilitarian arguement. You attempted - and failed - to underscore factual flaws, but made no attempt to disprove logic.