Thanks @JonW for your comment on my professionalism and my community upstandinglynessism.
Yes, I took a great deal of professional care designing this ad - no cheap laughs were being saught here.
This was a task of consideration of our users, while seeking to achieve an objective of appealing to their curiosity with a single glance.
The design was to be neither too obvious, nor too discrete, but above all I wanted to delight and surprise, but not to offend (NSFW) (at least not too much or too blatantly).
I wanted it to be seen by some and not by others - I wanted it to be there and yet not there. I wanted to toy with the gestalt principles of grouping, proximity, alignment and good continuation.
It was an exercise in demonstrating the Law of Prägnanz, and Ockham's Razor.
To some it may appear obvious. To others it may have to be pointed out. Many will just accept the simplest interpretation - the one that seems natural.
Some may regularly use the three word phrase and spot it quicker than those less inclined to swear.
Some may not be sure whether it was intentional - say nothing, and give it the benefit of the doubt. This adds a little something to the user experience.
I considered the font, the angle of the text, the top (instead of bottom) alignment of the F with the or; the verticality of the backbone of the F to match the regular verticals of the ux; the placement of the F half overlapping the ux and half raised above.
Oh yes - this was very much deliberate. For this I deserve nothing better than a good 3 day ban - or maybe - just maybe, it's another example of how to teach UX theory to beginners.