欧阳修 临江仙

[fiefoe]

池外轻雷池上雨
雨声滴碎荷声
小楼西角断虹明
阑干倚处
待得月华生

No wonder the second half gets suggestive, the poem was composed at an equivalent of the Cyprian's ball. For an account of the racy backstory, and more, read on.