When Heracles called for wine, (Pholus) said he feared to open the jar which belonged to the Centaurs in common. But Herakles, bidding him be of good courage, opened it, and not long afterwards, scenting the smell, the Kentauroi arrived at the cave of Pholos, armed with rocks and firs. Apollodorus, Bibliotheca 2. 83 - 87
I think we all know the story of Pandora. According to Hesiod she was an evil created by the gods to curse mankind. Her dowry consisted of some evil to plague mankind from all the gods. (Some hope-chest! ) At recent discussions of Pandora at Hour 25, we discussed the possibility of Pandora's Box (actually a jar) being a euphemism for Pandora's womb or body. And that the actual lifting of the lid was a euphemism for sex. I looked for other examples
"And the other sisters of the maiden who had been seduced, namely, Molpadia and Parthenos, while watching their father’s wine, a drink which had only recently been discovered among men, fell asleep; and while they were asleep some swine which they were keeping entered in and broke the jar which contained the wine and so destroyed the wine. And the maidens, when they learned what had happened, in fear of their father’s severity"Diodorus Siculus, Library of History 5. 62. 1
Opening a wine-skin is also a euphenism for sex as demonstrated by the conception of Theseus. Theseus' earthly father asked the article how he could conceive children. The answer was;
"Loose not the wine-skin’s jutting neck, great chief of the people, Until thou shalt have come once more to the city of Athens.” Plutarch’s Lives; Theseus
On the way home he got drunk and knocked up his host's daughter. Which makes for a more sinister interpretation of Pholus and Heracles.