You gotta love self-delusion

It is a jury of your peers who determines whether or not you are guilty.  And most of the time, they're not that stupid!

Sure, the song and dance you describe can be used to justify what happens in the room on the day, BUT WHAT ABOUT:

1) The fact that you responded to an ad that more than vaguely suggested that sexual services were on offer, not the mere offer of companionship you describe.

2) The fact that her site contains pictures much more explicit than one would expect to see if all she was providing was her company at dinner, or social events.

3) Did she ask for a provider reference?  Did you say oh yeah, I've had a great time with Wilma and Betty.

By this point, you have more than likely have removed all reasonable doubt from the jury, btw - your hit on her site, your email, or a recording or your call will likely be presented as evidence).  So even if you say all the right words in the room, just being there with the appropriate amount of cash can confirm that your intent was to break the law.

The hobby has risks.  You are better off researching providers than trying to come up with cleaver to beat LE.

Just exactly where do you think the "time and companionship only" disclaimer on every escort service website came from anyway? Dude, if you want to hang your hat on the "she really really liked me" defense have at it. You won't win. If LE wants to bust you they will bust you.  You can tell them that you where just paying off a tiddlywinks bet if you want but you are still going down, and not in a good way!
Spend more time doing your homework and looking here for legitimate providers and you won't have to worry about your defense tactics.

And don't forget that the hourly rate you're paying is way more than what the lady's companionship over dinner could possibly be worth.

But don't worry.  The jail where they will send you is for accommodation only, not confinement.  If you stay there for several months without setting foot outside it's because you chose to, which is your right as an adult.

You've been selected by the President to make sure that this cash gets to Iraninam freedom fighters and the provider is a secret conduit for the money, but you can't tell any of the police the names of any of the people because of national security and the provider is so proud of you for volunteering to pass this money along that she just can help herself from making love to you.

Ya, that's the ticket.

(still not a comedy writer)

The vast majority of crimes carry a requirement of some type of intent.  As a mental state, this is always a question of what can be shown and what type of rational inferences can be drawn.  

If all you know is a person has a bullet in his head and that John Doe admits he shot the victim, but says he did so by accident, the jury has the choice of not believing Doe and convicting him of murder, which requires an intent to kill, or believing him and acqutting or convicting of an accidental form of manslaughter.

Advertising on cites that cater to certain activities creates an inference that the advertiser in engaged in that activity.  

The jury can believe those inferences.  

The bottom line is if you got to the stage where you are arguing to the jury want was meant it is too late.

Here's The Deal...

I'll set you all straight.  I won't tell you my afiliation, but, here's how it is.  As a hobbiest, DON'T ASK FOR ANY SERVICES!!!  Plunk down money for "Time Spent", and let mother nature take it's course.  As a provider, same rules apply, but in reverse.  Don't offer any services verbally.  In either situation, once one party offers or solicits services to another party; GAME OVER!!!  Also, these cases don't go to a "JURY".  You're not O.J. for crying out loud!  The outcome is decided by a Judge only.  And if by chance you are brought in, a good lawyer will get you home by dinner.  There's always a risk involved when hobbying or providing.  We all agree that it should be legalized, but welcome to America!  Just be safe out there!  LE isn't the only thing to worry about when partaking in this activity!