No not quite. So when a male plant and a female plant love each other very much.... jk lol. This is like explaining the birds and the bees of plant sex and that shit just made me laugh out loud. Im an idiot btw...
OK so in all serious now. So generally speaking when a male plant and a female plant are left on their own to create seeds there will be a mix. It's kind of like people some of the seeds will be male and some of the seeds will be female. This is the way it is in nature. Sometimes there will be slight differences between strains, for instance some strains may have 50%m/50%f while other strains may have like 40%m/60%f. It will vary but the point is normally you wil get a mix of males and females. These are called regular sex seeds. These are what I prefer because in the future if I choose to create more seeds I can do that.
Now moving on to Feminized seeds. This is something completely different. This is done by people or seed companies that want to create all female seeds. Obviously when we grow bud for consumption it is only the females that ultimately we want. Since this is the case the breeders can use special techniques in order to trick nature into creating all female seeds. Breeders can use techniques such as the usage of Colloidal Silver in order to create feminized pollen. Without getting too deep into this lets just say that it is very doable and I myself have created feminized seeds before. I personally believe there is nothing wrong with this if you choose to do it for your own personal use. Hard core traditionalist will frown on feminized seeds because the lack of male genetics in the gene pool over time can create inbreeding issues. It makes the plants more susceptible to a condition called hermaphroditism. This is a problem revolving around inbreeding. For instance the problem you had with the plant throwing nanners that could very well be due to a pinched gene pool. In nature there is always fresh new genetics of males and females breeding together which diversifies the gene pool and makes for stronger vigor and overall health.
Wow that was much more than I was planning on typing. I guess this turned into todays plant sex 101 lesson ha ha