I dare you to try to refute my point, rather than sit here and dismiss it entirely. I dare you.
By not trusting your daughter's boyfriend you are not trusting your girlfriend's ability to choose a decent boyfriend. The boyfriend can not go behind the girlfriend's back and get her pregnant when she's not looking or anything
. It takes two to tango, and anything that her boyfriend can try to do to get her pregnant can by thwarted by her own maturity. Then again, why would her boyfriend of 16 ever be trying to get her pregnant?
You seem to be confused about what irrationality is. Statements are either rational or irrational. Whether or not they are rational or irrational depends on whether or not they follow from their premises.
Here's parental logic as you describe it.
Premise: I am a parent.
Conclusion: Therefore I am being rational.
It's a non-sequitur. That is, the conclusion doesn't follow from the premise. That's why it's irrational, you see? It's illogical. It makes zero sense. It's a fallacy. It's wrong. It's ireconciliable with sense.
I hope you can see that things that parents say CAN be irrational.
I won't be 'allowing' it to happen. I won't be making a rule which says 'my daughter is allowed to have sex'. Just like there isn't a rule which says that pedestrians are allowed to whistle while they walk. It's not banned, but that doesn't mean it isn't bloody annoying. So yes, my daughter having sex in my house will not be 'allowed', but it will also not be 'banned'. I will simply wish to remain ignorant of it, since I don't like much the idea of it. And if it gets to the stage that I'm hearing it through the wall, then I will pull her up for it, and ask her please not to be so noisy, just like I would pull up that annoying pedestrian walking past my house whistling. It will be an embarrassing thing to request, but I'm sure I can stop ignoring it for a few moments just to request that she cease being so loud. In any case, I will never object to my daughter having sex in my house. Noisy sex, yes, but sex in itself, no.
Yes, and you produce flawed arguments too much, what of it?