The first one isn't very funny, just something I noticed. When the villagers breed and start heading toward the hut, you can immediately click on the female and check her health status. If she is going to get pregnant, it will say "nursing" even before she gets to the hut!

The second one just happened to me. One of my older male villagers was trying to breed with a younger female. The old guy walks so slowly that the female went into the hut and exited before the old guy even got there! I wish this had more sounds, I could just hear him calling out to her "hold on there missie, slow down!"