They may, but will not do much harm to each other if they do.
Yes they have been known to.
Your parakeets may have not been male and female they might have just been 2 females or 2 males.
yes they do.
It likely has something to do with your terrible grammar.
No
singing is a way of comunicating for parakeets and a way of showing comfort, the male is probably not used to see a female...give him time, he'll get confortable in 2 weeks latest.
Well, if parakeets are healthy and happy both male and female will chirp alot. That being said, male and female parakeets will often screech if they are not happy or if something like your music being played too loud or a cat is bothering them.
sometimes
Yes, Parakeets love to have company in their cage, two mail parakeets would be fine together.
You shouldn't because the male will mate with one of them and parakeets hate being lonely and the other one will be left out....
See the Related Link.
Boy parakeets are commonly referred to as "cocks" or "males." In the context of pet bird ownership, they can also simply be called male parakeets. Male parakeets are known for their vibrant colors and often more vocal behavior compared to females, especially during mating season.