I would recommend neutering him. Intact males get benign prostatic hypertrophy (BPH). This can lead to secondary problems such as infection or cysts in the prostate. Neutering can also reduce testosterone driven aggression, roaming, etc.
I would not recommend breeding you dog unless you have done all the recommended health testing (www.dpca.org
) and he is titled in some way (Conformation, ring sports, obedience, agility). There are just too many unwanted dobes in rescue as it is.