1. SCIENCE ... cannot define sexual morality.
simple, "sexual morality" is not scientific or necessary. Its an idea spawned by bronze age goat herders.
the limits should have some kind of practical purpose, ie; don't have sex with kids!. don't rape people. These are crimes that have been pretty well established. People's choice of who they sleep with if anyone, doesn't need laws outside of the criminal acts of rape and child molestation.
2. SCIENCE ... cannot make moral decisions on the embryo’s right to life.
The witness common fallacy of saying well science can't do his and that is so damn stupid. What is science?
the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment.
What does that have to do with moral decisions?? Abso-f-cking-lutely nothing. Its purpose is not to solve the worlds moral dilemmas. 'Science can't stop war" ..."can't end sickness and death" "...it can't remove the stain of sin..." oh my lord... its not suppose to!!!