3 Metaphors for prolific

Always prolific of heated discussion has been one question: 'Are the horny laminæ secreted by the sensitive?'

But no man can tell, by bare inspection, as yet, to which class of turnips, the more or less watery, his own may belongwhether that which is apparently the most prolific may not in reality be the least sowhether that mode of manuring his land which gives him the greatest weight of raw roots may not give him the smallest weight of real substantial food for his stock.

Are not adulteries as prolific as marriages?

3 Metaphors for  prolific