@Steve:— What you said, and thought you meant, in your astoundingly[!] innocent schooldays are not necessarily the be-all-and-the-end-all of the matter, you know. Usages can have different overtones and connotations among different users and groups of users; I don't think a group of off-duty soldiery using the same terms would have mentally-imaged their referents identically to you o-so-incredibly-virtuous-&-pure-minded-to-hear-u-tell-it schoolboys. And kindly explain and justify beyond doubt your assertion that 'Del-boy's constant use of "plonker" for his brother firmly established the word as non-sexual'. Why/how did it? -- Del Boy is not characterised as an unworldly vicar (and as to tv vicars, just you look at those of Dibley & Grantchester, at that!).