I think what you're striving for is that exceedingly long-shot hope that you'll get the "best" mega-combo from each sire, and/or are being kinda indecisive. For example, I'll probably put my lesser girl to my spinner and bumblebee males this year, because I can't quite decide if I'd rather shoot for queenbees or lesser spinners, and there is a teeny part of my brain that's gonna hope that somehow the most potent of both males' sperm gets through to give me one of each.![]()
However, I am NOT hoping that I get a lesser spinner blast because it just isn't possible*. Only one of the two sires can fertilize any given egg, as Heather said.
Another reason you may want to use more than one male is if you want to cover your bases in case your first-choice male doesn't quite get the job done.
* Would it be possible, though, to get a chimera of both sires?By which I mean that each egg would be independently fertilized, then fuse?