Sex and the single dog

For two years Jackson has never shown any interest in the opposite sex - until yesterday! He caught a whiff of a terrier bitch on the other side of the park and took off, like a bullet, toward her. It was so embarrassing - he totally ignored me and kept his nose firmly clamped under her tail. And she obliged by rolling over - the floosie! Eventually I managed to rugby tackle him and dragged him back home. Later we went out and met two spaniels on leads, also in season, and he snubbed them. Do dogs, like men, think about sex every 30 seconds?
"Do you have the time
to listen to me whine"