If it was your first time you probably broke your hymen. Or "popped you cherry" a's some say. I wouldn't say its normal to bleed for 3 days.
Yes. This is caused by your hymen breaking. Now that it has been broken, it shouldn't bleed next time.The above answer is true and is one possible reason. However, it is very common to have some...
If it's just two days and then it ends, it was just a shorter period. If it occurs again though, see a doctor and ask.
It depends on the reason if it does not stop in a reasonable amount of time have it seen to.
It means your partner will stick their fingers in your penis/vagina and feel around and massage you.