I feel it is a _bug_ as well. Especially when you DON'T want them to make babies, you have set their skill to either research or farming, but they insist on getting together. The minute I hear the kiss, it's too late. If I click the female, a baby instantly appears in her arms. I found that if you move the male, then throw a kid in front of the female, there's a 50/50 chance that it will dissuade the baby-making and she will run away. Because of this 'flaw', my village got bigger than there was enough food for and people began to die. Very frustrating.