Well, dragon's are pretty lazy by nature. I mean, I have two and all they do is lay around all day, it's totally normal. Of course they will "perk up" around other dragons, but it doesn't necessarily mean they are happier, ya know what I mean? These aren't animals that need or desire company to be happy, they are perfectly fine basking all day and occasionally running around on the floor to explore. I think it's a pretty common misconception that these lizards are happier with company. Of course they WANT to be together and mate, it's in their instinct, but it isn't necessarily what is best for their well-being. Unfortunately it can often lead to more stress for them in the long run, and sometimes even injuries.
It doesn't sound like your pair are incompatible at all. It sounds like they get along fine and the biting is just normal mating behaviors. Do keep in mind, though, that constant mating after the female is gravid, and directly after she lays eggs, can be highly stressful on her body. Not to mention all the responsibilities and expenses you are going to have raising dozens after dozens of hatchlings and trying to find them all homes. The market is flooded right now, and even some of the most succesfull breeders end up stuck with a few babies when they can't sell them all.
Some people keep mating pairs together with no problems and that's fine, but I am of the opinion that it is much better in the long run, for the beardies and for you, if you don't keep them together 24/7.
That's my 2 cents.
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Amanda
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2.0 bearded dragons (Ocho / Domo-kun)
0.1 kingsnake (Rio)
1.0 ferret (Playstation)
1.0 cat (Wally)
0.1 dog (Tima)