[The following has been patched together from some emails sent to me by the author. Carceri]
I am describing an experience I had in a very private BSDM club that accepts 2 couples at a time only.
Rules are that the two girls have to take punishments after an exchange of partner.
At the admittance each partner receives from the other list of offence that girlfriend did. An assistant (female) of club reads the lists together with the boys and suggests proper punishments for the girls. Another assistant girl during this tame takes care of the stripping and the preparation of the 2 girls to be punished, delivers them to the respective masters, advising the eventual need of additional punishments if misbehave occurred during strip and preparation procedure. Then the assistant girls disappear but they can be further involved at any time if it desired.
The Dungeon is very well equipped with every piece of furniture and every toy you can image to perform punishments on female?s bodies.
What I never saw before is a special device consisting on a twin wooden pony assembly where two special ponies face each other. Assistants explained that this equipment is very effective for a combined punishment of two girls who did make offences together. (For example lesbian plays without permission of their boyfriends).
Each crossing board of ponies can be adjusted in height as usual but a further central thin board is provided. It rises by lifting a hook located on front part of the main cross board itself.
Girls are prepared to ride wooden pony as usual. They get ankles and wrists restraints.Ankles are hooked to chains pulled to force feet apart thus resulting in a wide angle of leg opening. Wrists of girls are hooked to a hoisting bar whose hoisting rope runs over pulleys located on ceiling and comes down for connection to the hook in the front part of the board of the facing pony station.
The ride for both girls starts as usual. If one of them pulls down the hoisting bar causes the rise of the central thin board that penetrates easily in pussy of the partner in the punishment causing additional discomfort/pain.
I and a friend of mine only had an experience with XXX and another girl. They agreed to visit the club for an an unusual erotic experience. Nobody of us knew about this special hardware. We had girls riding the twin pony for 1 hour. It was nice to whatch one girl tryng to reduce her own pain and thus causing more pain to the other that reacted in the same way. I agree with you: it was an higly erotic experience. The twin pony we used allows several adjustments to change the type of disconfort to the riders. For example two small buckets can be attached to hoisting bars and you can have water dripping on them increasing the weight gradually.
The hardware is located in the dungeon of a very private club in my city. The access is strictly reserved to members and the limit is that only two BSDM couples can partecipate for each evening. Sorry but I do not have any Photo of it neither it is allowed to take pictures there