[southern rock]

Can you prove it by the bible?

Yes. The so- called "F Word" and the other words that have been arbitrarily decided upon in modern times to be "profanity" , are generally Anglo-Saxon in origin, or originate in other languages unknown to the Bible authors.

So the Bible has no opinion on modern day Anglo Saxon "profanity" . We are free to decide that those words are perfectly appropriate, if we wish, just like they has previously somehow been decided by some dubious means, to not be appropriate.

[HiTech RedNeck]

Well we could factor that cavil out by rephrasing it

“I wish to perform an evil sex act upon you.”

How is that any worse or better?

[HiTech RedNeck]

And indeed it would not be evil in a biblical sense to tell one’s properly wedded wife that one wished to “fuck” her in an Anglo-Saxon sense.

But again consider the connotations that term has acquired. She probably is not going to think ah, let’s meet in bed. She might throw an object at me.

Again “corrupt communications” figure. You can’t change expectations. So you have not dodged the bible at all.

[Oratam]

I agree with you. These words are ancient and were once perfectly good but have become "course" over time, generally because imported words have replaced them. This is really a question of manners. As a society, we have agreed that certainly language isn't acceptable in every instance. That agreement has been weakening for some decades but most people adhere to it.

My late father, who I only heard swear once (and it was doozy directed at a driver who cut us off) said, "'F.U.' was the phrase saved for the end of the argument."