The following quote is from Spurgeon’s Lectures to my Students (not a blanket-endorsement of Spurgeon):
“… never spiritualize upon indelicate subjects. It is needful to say this, for the Slopdash family are never more at home than when they speak in a way to crimson the cheek of modesty. There is a kind of beetle which breeds in filth, and this creature has its prototype among men…What abominable things have been said upon some of the sterner and more horrifying similes of Jeremiah and Ezekiel! Where the Holy Spirit is veiled and chaste, these men have torn away the veil, and spoken as none but naughty tongues would venture to do…Young men especially must be scrupulously, jealously modest and pure in word: an old man is pardoned, I scarce know why, but a young man is utterly without excuse should he overstep the strict line of delicacy” (C. H. Spurgeon, Lectures to My Students).
Agrammatos 