https://companionparrotonline.com/columbo.html
https://companionparrotonline.com/sex_csaky.html
Please read the above links.
I don't have a B&G Macaw but i can imagine the sexual behaviour is much the same with all species. But when any of my birds start displaying these behaviours i simply put them back on their play stand or if they are really they get a shower. That usually gives them something else to do & takes their attention somewhere else.
If your birds are a little over the top with their intentions I have heard that Avicalm can be given & it does help.
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AviCalm Calming Supplement
Avitec's AviCalm is an formulation specific for parrots. AviCalm uses a compound found in green tea leaves and is safe for birds. Can be of help for parrots who scream more than usual due to fear or stress, nervous or aggressive birds for a calming aid. Can also be of help for behavior related feather pickers and chewers, and over-preeners.
Can be used when your bird will be traveling, or moving to a new environments, to help relieve some of the stress that might occur.
AviCalm is completely safe, non-sedating, and non-toxic. Can also be used along with Featheriffic! for birds who over-preen or remove feathers.
Just sprinkle on fruit, fresh veggies, bird bread, or even on dry seed mixes.[/FONT]