I am happy to hear you are enjoying. The gloryhole isn't actually a glory hole but a spy hole so no BJ scenes there. For those in Haven, the Viktor chain has the most. Let your mood drop and Sammy will go and visit him. There are also random scenes around Haven that has it, as well as on an earlier mission with Simon.
School/park/lake is there for planned future content, but currently doesn't have a lot. These areas are planned to be worked on once the Haven mission is completed.
There wont be abortions, but you will be able to buy pills and probably a perk eventually that blocks it. Slut flag is more something that is for the future so when new content it added, it knows your experience and can start things off appropriately and not just assume you are pure. Consider it a perk that just buffs your sex check dice rolls. Not really needed right now but in future it will.