Nearly all these 'acronym' explanations for common words such as f*** and sh** are nonsense. Any good reference dictionary will tell you the origin of such words, invariably considerably earlier than...
In ancient England,pipo cudnt hav sex without consent frm da king.when pipo wanted to hav a child,they had 2 solicit a permission to da monarchy,in turn they wud supply a plaque to hang on their door...