That way a woman could simply ask "how long is that puppy?"
We all know that women are very much into closeness and intimacy and perhaps the smart money in this case is to go for shorter "wide angle" lenses and even macro perhaps. While the insecure types are standing back half a mile or so showing off for each other, we could be "up close and personal" and striking oil, as it were.
I think that you are correct...I would go for a 150 mm 1.4 over a 600 mm 5.6 any day. (The front element would be humongous), This would open all kinds of indepth discussions on "depth of field" versus "depth of focus". I can see the coffee houses now...absolutely overrun...hardly find a place to roost.