As long as they havent been near a female or they can smell a female on heat they will be fine.
No, they don't have to be the same age to live together.
NO!!! guinea pigs and rabbits can NEVER live together, the rabbit could kick the guinea pig and end up killing him!!
male+female= babies male+male = might fight female+female= might become friends
If it's male, it doesn't matter, just make sure they get along
Your male guinea pig is trying to mate with your female guinea pig.
Try to put them in a small cage together.
Most likely, yes.
it depends what type of guinea pig you have
your female guinea pig should at least be 3 to 4 months and no after 12 months and maybe after 12 months depending if her bones have fused upand the male guinea pig should at least be 3 or 4 months or whenever the male takes interest in the other sex
Male guinea pigs can succesfully imprenate a female guinea pig at (I believe)only 8 weeks of age, however it takes about 9 months for the guinea pig to be fully grown.
Well actually yes, they might fight. Males guinea pig's in general tend to fight with another therefor, it is a better idea to have two females or a male and a female together. But some males can get along, but usually males tend to fight.
A male guinea pig can impregnate a female when it's only two months old. It should be separated from its mother and sisters by six weeks.