Yes, it is ideal.

Sure thing, even Pre-ejaculate (pre-cum) can also have a tiny bit of sperm in it, so pre-cum may cause pregnancy if it gets into the vagina.

Sperm coming out of Vagina is a normal occurrence. I guess it depends on the sex positions. Most women bleed for 3 to 5 days, but a period lasting only 2 days to as many as 7 days is still considered normal.