I wonder what that "Base Game Update" is on the roadmap?

The hints in the High School Years info (something about helping your sims find who they are) and the facts that there will be crushes and you can be asked out by other sims in the new pack, support the idea of an attraction system. Or at least a system that will let you set gay/straight/bi/pan and cis/trans.
My hope is that it will also allow you to set faithful/less faithful so some of my very married sims can stop engaging in flirting when I'm not playing them.

But that's speculation, and it's almost certain to be the update with the body hair.