Oh yeah, Mr. know it all said pre-week 25 has nothing to do with any living human and that is so. And a few pages in a tech forum just settled this one of the biggest debate in the 21st centuray with a definitive conclusion. Yeap, I bow down to your all mighty knowledge and expertise.
The point is that you got a choice, your wife/girlfriend got a choice, use protection, use planning and if all fails, man up and take up responsibility. You DO NOT KNOW when a life is formed, we do not know. You are assuming killing a fetus is not killing a human being. Just admit it, you are taking that chance to absolve yourself from any responsibility and the consequence of that fun and enjoyable sex.