Why are Teddy so dirty?

Teddy’s straddling behavior is not because Teddy is in estrus 365 days a year. They just instinctively want to declare themselves through this action that means "conquering". The status is higher than the other person, that's all. And Teddy is a very insecure animal, so it will relieve loneliness and release stress in this way, so you will see that both female and male dogs will have this action, which is a direct reaction of Teddy's fear , it may be seeking protection from you.
In fact, not only Teddy dogs, but also many small dogs have this habit of rubbing against whatever they catch, including Bichon Frize, Pomeranian, Dachshund, etc. It’s just that there are many people raising Teddy dogs, so They are the most famous.

The reason is related to Teddy's dignity. Large dogs mostly fight to identify the "boss", but small dogs deal with this problem in a more "peaceful" way.

In order to declare that his status is higher than that of the other person, Teddy will instinctively try to "conquer" the other person by hugging and rubbing against him. Once the other party doesn't resist, Teddy will become more unscrupulous, do whatever he wants, and kick his nose in the face.