In any event, I really do like animals. I like it when dogs or cats sniff, ask for pats, walk around my ankles, etc. I will give pats till the cows come home. I don't mind face licking if I have approached the dog, rather than the dog jumping on me. I will usually initiate greeting a household animal, if it is receptive.
I do not like having my crotch sniffed, but I know that is normal greeting behavior and know how to gently blockade it/move away. (Just like having a baby go for "nursies" is normal behavior - I politely blockade that too.)
Dogs jumping on a human while they are sitting down is not affection. It is dominance behavior. I do not allow myself to be dominated, or humped on, or any other type of aggressive or invasive behavior. For one thing, it is not safe in the long run. If the dog starts thinking I am submissive to it, we are going to have a real problem when it decides I am challenging it's supremacy. And if a host also believes fellow humans should come below the dog in the pack order, I am better off out of that person's house.