De eerste bekende siamese tweeling waren Chang en Eng Bunker, twee mannen uit Siam (hierdoor is dus de bijnaam siamese tweeling ontstaan). Deze mannen zijn getrouwd met een (gewone) tweeling en hebben in totaal 22 kinderen gekregen (de ene 10, de andere 12)
Ze hadden beide een eigen huis waar ze afwisselend sliepen. Chang ging het eerste dood, en toen hebben ze ze heel snel van elkaar gescheiden...
Zij konden na oefening naast elkaar staan (zaten vast bij de buik met een stuk huid, enige gescheiden orgaan was de lever). Kun je je voorstellen dat je broer seks heeft met zijn vrouw die sprekend op jouw vrouw lijkt...
http://en.wikipedia.org/wiki/Chang_and_Eng_Bunkerhttp://phreeque.tripod.com/chang_eng.htmlOverigens staat hier meer over hun seksleven:
http://www.bizarremag.com/ask_bizarre.php?id=314quote:
As for the details of their unconventional sex lives... well, like all Siamese twins, Chang and Eng had to learn to co-operate in order to survive, and they and their wives soon developed a workable modus vivendi, living for three days at one brother's house, and then three at the other's. If it was, say, Chang's turn to be at home, then he alone would enjoy sexual relations with his wife during this time.
Although the two were joined at the chest by a cylinder of skin which contained vital arteries, long practice enabled them to stand or lie side by side rather than chest to chest and it was not necessary for them both to be 'present' during coitus. In order to preserve a veneer of Victorian decency, it appears the brothers draped a blanket between them so that one could make love without the other seeing exactly what was going on. The two had separate nervous systems too, so there's no reason to think that the non-participating twin would have experienced any significant level of arousal during sex; indeed all the evidence suggests the pair were generally very different, Chang liking spicy oriental food and booze, while Eng ate a bland vegetarian diet did not drink (nor, oddly enough, did he get drunk when Chang was sozzled).
That's all the conventional sources tell us about the sex lives of the Siamese twins, but a little consideration suggests that while the missionary position and girl on top would have been perfectly practicable propositions, sex 'doggy style' would have required the non-participating brother to assume a position that rather humiliatingly aped what was happening on the other side of the curtain, and spoons would have been right out.