I Like the good ones, if they're done well, and I agree, one should know one's audience or be in "safe company" rather than risk widespread offence. I write them too, but mine are usually on topical subjects, so cannot be sung more than a couple of times before they go out of date, e.g.

Step we gaily, on we go, all the way to old Skibo,

Armed with super video, all for Madonna's wedding,etc,etc.

Tattie B