Remove the Stamen or Anther for longer bloom time?

[Iris]

I know it is common to remove the anthers from a Lily because of the staining issue. I have read that it also prolongs the bloom. Should the entire stamen be removed or just the anther?

Does this apply to all flowers? Such as Torenia and Alstroemeria?

 

[ChanellG]

I have never heard of this practice before. I'm curious to see what responses you'll get to your question. I'm also curious as to how doing this would give a longer bloom, especially since lilies tend to produce seed heads and I can't see that happening without pollen.