He is 16 week old wheaten terrier. We have only had him for 5 days. So i know he is still getting used to our house. He loves my wife, and 3 year old. Walks with wife on a leash, plays with her, etc. Everything a puppy should do. If i walk into a room, he will keep his distance of about 10 feet. But if i pick him up, he will sit on my lap for hours. He will never come to me, or even attempt to play with me. He will just lie down if i put him on a leash. I need to get him on a leash to take him outside to go potty. Thats the biggest issue. even if i take him outside he will just lie down and not pee or anything. He has no problems with the wife. What should i do? he is a great dog, beside not liking me.