I agree with you, but I do believe sex between a man and his wife is a very spiritual thing. I know I tend to let life get in the way of intimacy, but when I do take the time to really get close to my dh, I can see the difference in our relationship.
Besides, I don't think the pastor meant for people to do it like dogs.
I'm assuming he's talking about intimacy, lovemaking, and all that good stuff that goes with it.