Does it hurt the male dog with there is a slip mating?

Slip mating, where the male dog does not fully tie with the female during mating, generally does not cause physical harm to the male dog. It is a natural part of the mating process and can happen without any discomfort. However, if the male seems distressed or if there are repeated attempts without success, it may be advisable to consult a veterinarian to rule out any underlying health issues.