<human>: Can you summarize the given text in a few sentences?

My girlfriend's family has this adorable Shiba Inu. He will greet me when I enter their house, licks my face to wake me up and sometimes curls up on my lap.

But, as a lot of you will know, Shiba's tend to be very willfull dogs. It doesn't help either that they let him eat with them at the table (taking him on their lap), sleep on their beds and don't correct him when he doesn't listen (he ignores basic commands like "sit" and "come", so you have to effectively chase him with at least three people to corner him to get him out for a walk). It's not my dog, so I'm not going to tell them how they should raise him, because he's all in all quite a lovely one.

The problem is when he wants to dominate me. I'm there only twice a week so I guess he still wants to show me he's the boss sometimes. He jumps op to me to bite (not agressively, but not playfully either) me in the buttocks or ankles when I'm walking or sitting in the couch, and when I try to shove him away with my arms or legs, he'll bite in my fingers or toes and it can hurt quite a bit.

Now, when my Labrador at home would do that to my family or a guest (she would never), we'd grab her by her neck and push her down, like their doggy-mothers would do. I once closed my hand around the Shiba's snout to tell him he's a bad boy, but I guess I accidentally trapped his tongue between his teeth and he let out this surprised yelp that made me feel like the vilest creature ever. my gf's mom assured me that I was right to do so, but I saw on her dad's face that he thinks I should man up and let his cute little dog just play when he feels like it.

I already told my girlfriend I feel quite uncomfortable about the whole situation and I will confront her parents if this doesn't change soon. But I hoped the people of /r/dogs might have some advice for me, so I don't have to?
Like a way to show the dog I don't tolerate his behaviour and I'm his boss without hurting him?
<bot>: My girlfriend's Shiba Inu tries to dominate me and I need a way to stop him without harsh punishment so I'm not the boyfriend hurting the cute little dog of his in-laws.