I'm playing my first game on the new computer. The female dog has tried to WooHoo. I get a male dog friend to come over. They nuzzle etc. She enters the doghouse but the male wanders off the lot of chews up the newspaper. He never enters the doghouse. The human sims are the curmudgeonly grandfather and his child-aged granddaughter. Neither of them are going to WooHoo any time soon.

Do you have a relationship threshold set?