As expected, it's really about not letting people have pleasure

[Rev Dark]

Sexual activity is designed, biologically, to end in pregnancy. The fact
that it's fun to perform is a biological imperative to encourage us to
reproduce.

The above is an extremely simplified statement; to the point where it becomes incorrect.  Sexual Activity serves, at least for homo sapiens and several other species serves multiple purposes.  For many species it is a seasonal activity, ensuring reproduction only occurs when the resources exist to provide the mother and offspring the best chance of survival.
For humans, other primates, and several other species it has a strong element of social and societal bonding.  It is fun; but that fun is to encourage individuals or groups to stay together; which has strong survival advantages.  Many of our secondary sexual characteristics and far more open reproductive schedule derive from this.  The drive for societal bonding is just as important, if not more so to the survival of our species; and one of the reasons we have been so successful as a species.
So ECS, let's test the water on your pro-life stance?
Can a pregnancy be terminated if carrying to term will place the mother's life in danger?
Can a pregnancy as the result of rape or incest be terminated?
Can a pregnancy be terminated if the fetus is biologically non-viable?
At what point in development does it become 'a person'?  As soon as sperm and egg merge?  As a blastocyst?  At the point of external medical viability?
At what point should a murder charge be brought against a mother for failing to carry a pregnancy to term?
At what point should an assault charge be brought against the mother for activity determined to be detrimental to fetus development (Smoking, drinking, physical labor, chemotherapy, treatment of extant medial conditions, nutrition, etc.)?
At what point do laws governing the self defense and defense of others allow a third party to act in regards to 'person' with the restraint or the mother or assault of the physician?
Does your stance on birth control include 'morning after' pills?  To use your highly suspect airplane analogy - are ejection seats and parachutes viable mechanisms.  If not?  Please explain the airplane analogy in regards to both.
Curiously yours,
Shayne