The sex content is not front and center within this game.
You must build a base, or at the very least a bed, couch or shower. PC can masturbate in these locations if your mental state allows it. If you find one of a handful of hidden dildos scattered around the map, there are additional animations.
The latest update added a trader which can be found in an underground bunker. PC will argue about prices after the second or third visit, which opens a scene to "negotiate" prices.
There is no other sexual content in the game yet.