Re: Images of Wonder Truth and Fear...
Actually, that comparison fails on a much baser level - it's comparing experience to possession. After all, the child would not be keeping the rifle; only the skill with the firearm. While, on the other side of things, it would be fallacious to think that possessing a female - or indeed male - biology would innately grant any amount of sexual prowess. (I am operating under the assumption that success as a prostitute does generally require some form of skill, as essentially all professions do. Perhaps sexual skill is a poor indicator for success in prostitution; perhaps 'lack of shame' or some-such would be a more applicable skill to mention here.)
On the other hand, given the wording of the joke, it's possible (if an excessive stretch) to interpret the fictitious general's words as indeed comparing skill with skill - which requires that he is aware that the reporter possesses a significant amount of sexual ability, giving the joke a whole 'nother level.