A couple of oblique references to other foods are worth noting, because there is a certain correspondence between their usage and certain sexual problems.Martial, I recall , suggests shallots and spring onions for the older man with flagging libido -the chemistry here is not illogical. The onion family are the best source of quercetin a useful flavinoid (or particularly flavanin) which is particularly useful in helping the diseased or inflammed prostate, also they tend (along with rutin ) to keep arteries pliable in general.So the advice whilst unlikely to promote an immediate arousal, would, if used diligently improve the general health of the reproductive organs.
Wiki is quite good:
http://en.wikipedia.org/wiki/Quercetin
Also Pliny does mention a ghastly mix of pomegranate and( bull's?) testes , now I understand the "sympathetic" part of this (as im sure everyone reading this will) , but the pomegranate is tremendously alkaline and cleansing ...a jaded voluptuary could do worse than fast a little and imbibe plenty of pomegranate juice .
Oysters of course are rich in zinc, zinc is a key to sperm motility therefore I certainly commend oysters to all as a nuptial feast..alas if one is ingesting too much iron this will be of no avail and one can carry on in this vein (no pun!) the key is of course balanced diet with healthy range of minerals and good cardio health. A comely companion with prominent curves and witty chat helps best I find.
The collision of wishful thinking, actual therapeutic value and sympathetic elements are an indivisible mix..but witness this little gem from 20th C rural Germany "In parts of Germany, even today, some people think that eating an apple that has been soaked in the perspiration of their intended lover's armpit is a sure means of seduction." Well ok you could argue that a hint of hormonal excitement might get through , but id prefer my apple cooked.