[thedoc (OP)]

Male bower birds use optical illusions to fool females into thinking the males - and the titbits they offer as part of their courtship rituals - are larger than they really are.

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[Don_1]

I'm say nothing here, on the grounds that it could get me banned and make me a laughing stock.

[Nizzle]

Well guys, may I suggest perhaps pruning away the undergrowth to make your offerings look bigger than they actually are……

I lolled, but that would be deceptive.. like wonderbra's!