I see them all the time and think it's very poor in taste. Not because I am offended but because there are still "ladies and teenage girls" out there and some common sense tells a normal person that a set of nads hangin off a truck or a decal of a couple of animals bumpin uglies is just plain stupid.. A bunch of guys sittin around fartin and telling off color jokes is alot different than doin the same thing around a lady or one of your teenage girls..... It's a redneck thing and is just dumb. I didn't read the linked article but I can guess as to what it was about..
The keychain idea would be better.... That way some guys could actually say they have a set.... The Wives usually has the Husbands "OEM" stuff in a lock box....
Tommy