No it's fine - there is a theory that the pairings stimulate follicle growth.
We do tend to pair a lot more than is really needed though - I'm fairly happy with one lock per month with the female.
The important thing is to make sure the male isn't losing condition by breeding him too much. I like to make sure he gets a nice long rest and feed between the locks. I know you aren't in this situation but I often see a lot of forum posts around the net where people pair the males to as many females as they can and it gets on my nerves.![]()