Let me see if I can put this into context.
Firstly, I live in the Caribbean, and this new " twerking " craze that has recently hit the US has been here , well forever. It is a way we dance and express ourselves. The term we use is
" wineing ."
Yes, its very sexually suggestive , but it is what it has always been, a form of art or cultural expression. Both men & women of every age and background do it and alcohol is not always involved, just sweet music.
It is the way we dance.
I suspect that this dance came from the Caribbean to the US, via many of the US pop stars , celebs and rappers who come here for fun and to party.
Here's a small clip of a street carnival party / parade; Trinidad Carnival- Harts 2013
Observe there are people of every age , male and female.
Here's another vid of Rhianna grinding and bumping her lady parts at a similar street party in Barbados a few weeks ago; Rhianna At Crop Over, Barbados.
Just to put everything in context, this type of dance is very normal down here,it's how we party.
Women grind on women, women grind on men and so on.
Some couples might agree before to only dance with each other, some might go to a party with a group of friends and agree not to grind on strangers, only grind with those in the group.
And still some might just grind on anybody, male or female.
However I can fully understand the cultural shock this type of dancing would bring into a society that is not accustomed to it.It is a very sexually expressive type of dancing.
My wife is not the partying type , but I remember when I was single and hitting the clubs, my date and I would hang out with a group and only dance like that, with those in the group, male and female. She danced with other men, I danced with other women.
I can fully understand why it would be disturbing to a husband at home and his wife out there grinding on a strange man in a club under the influence of alcohol.
However I wouldn't have a problem if my wife did this with ONLY women in her all girls group , if I wasn't around..
I see it as a way of " letting her hair down ", and expressing herself in a safe environment with other RESPONSIBLE women.
But it's better to be around your wife or SO and enjoying some fun. It is a very subtle form of sexual foreplay and the rewards are usually reaped in bed immediately after.
However if either partner is not present, there should be a level of caution.
Things can head southwards, very fast.