A Trooper Watering his Nag - sing it often. In fact a lady about 15 year my senior - when she heard it thanked me for doing a complete version because she only knew it as a nursery rhyme with one innocent verse.

And recently there was a song on the radio that left nothing to the imagination from the same era if not the same book - Pills to Purge Melancholy by Thomas D'Urfey. 1st ed 1715.

see the thread on Samuel Pepys