
When it's in a romance novel. A friend who is former editor for a romance publisher, informs me that words like "penis" and "cock" are redlined in manuscripts because the terms are considered too unromantic. (Interestingly, erection is allowed, but only two "erections" are permitted per novel.)
In case you ever decide to switch to the kind of copywriting that generates $1.52 billion a year, here's a list of acceptable euphemisms:
proof of his manhoodOf course, even in romance novels, manroots aren't always in action. When not "throbbing in her love grotto", a penis may be described as "a swaying promise of future delight."
raging beast of his desire
tumult of his love
raging monster of his lust
love tool
his hardness
turgid shaft
manroot
unsheathed sword
the hard length of him
pillar of manhood
tallywacker
pike
rod
throbbing member
privy member
evidence of his masculinity
and (my personal favorite) the bald avenger

