Ants and yucca pollination

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Ants and yucca pollination.

I can't belive a yucca moth would want to land on the only yucca with ants on it. I have seed on my yuccas but only when the ants attack them, never on the ones ants leave alone.
I have seen this several times in the past years, and yes the produce seed. I have wild yuccas that have popped up from this seed.
Has anyone else had yuccas produce seed without the help of yucca moths?