Thanks, guys! I am starting to wonder whether the bunny ears sign means whatever you want it to mean, or nothing in particular, and could be seen as an example of non-verbal folklore, passed on by observation and imitation.

It possibly or even probably did come from the cuckolding taunts which I hadn't thought of, but also, I think that when males do it to females maybe they are expressing non-verbally what Crystal said:    "Kiss me now S*ag me later". The horns make sense in that way.

But some people probably just do it because that's what people do when they are getting their photos taken.

I just thought of an unusual sci-fi novel I have read by John Crowley called Engine Summer. As a representation of the folk process it is well done. Briefly, society as we currently know it has been broken down by war or something catastrophic and people-generated. A lot of the impact of the book, for me, was the way that a previous society is portrayed in memory and words and in effect, folklore. A lot of concepts held by the small community in the novel appear to be one remarkable thing in their society and are later seen as being something commonplace or ordinary in our society. A bit like the movie First Contact, except in reverse. It is the descendants of the previous highly technological and developed society who are interpreting the signs and the folk memory of that society.

Too hard to describe here, but well worth reading. It's only a short book, but read it slowly and absorb the ideas. I re-read it recently and enjoyed it even more the second time.

So, in that light, bunny ears might have once been something specific but now could mean different things to different people, or might just be a habit which many people don't stop and think about.

Helen