My girlfriend says i smell like a wet dog when i get out of the shower. what could be causing this smell?

Uncertain : This cannot be a simple answer. You may benefit from seeing your physician. I cannot tell if it's related to the soap maybe you use or internal sweat issues.

Wet dog smell: Try using a more smelling shampoo that is more effervescent on your hair. Make sure you thoroughly wash your hair with every shower. I do not have long hair and I do not know how long yours is. Also, you can try a male body wash like Dove or old spice. This may help. Hope my answer was helpful. Good luck and feel better.