It is a terrible idea...
1. DISEASE.
2. separation (because they mate and then what?? He cannot be made captive, and parrots get very attached).
3. Babies that you cannot care for and she cannot tend on her own...
Breeding is VERY complicated and expensive, so don't just "start breeding" unless you have A) apprenticed experience (long-term)....plus, some extra cages, an incubator, humidity gauges, baby bird formula and LOTS of time...It can also pose a threat to your mother bird.