I'm really glad that you live way over there, and I live way over here. Otherwise we might pass each other on the sidewalk - not even knowing each other - and you just might be in killer-mode today, and I'd be dead.
Your argument is that by thinking "we have a contract" I would not kill you with a tea spoon if I wished? You would be alive for two reasons;
1. My moral rectitude and my beliefs do not allow me to kill unless there is no other way of defending those I love.
2. Killing is a crime in Paxmania and the Paxmanian judiciary would make sure I understand that.
There is no contract either in having sex, there is simply an expectation from both sides that does not include having unwanted kids. The rest is mumble jumble.
See, that is something we can discuss - and it has been discussed a million times in many places. When is a human a human. My guess, 2 cells does not pass the bar.
That's your problem with understanding sexual intercourse. If a person needs to feel aroused and excited, masturbate. Don't get into the position of unwritten contract with the potential person being made by the sex act.
Trust contract:
Man = Grantor
Woman = Trustee
New life = Beneficiary
God = Protector
Thank God that in His protecting He is patient with your stupidity. But stop being stupid and start to learn. From Exodus chapter 21:
Just because an agreement is not written, does not mean it does not exist.