Jacob loves Newt's creatures and doesn't ever want to make Newt choose between him and them.

But it would be nice to maybe go to bed at the same time or have dinner together or a little bit of private time...

Basically, Jacob feels guilty about wanting to spend time with his boyfriend away from the magical creatures, Newt thinks (or doesn't think) Jacob wants more from their relationship, terrible communication abounds. But it gets better! And how it does, is up to you.

Also, if there's sex, I'd love to see Jacob on bottom.