You’re thinking way too hard about it, the show is just a power fantasy, and part of that is having an attractive love interest that throws herself at you for some reason. This time the reason is that the MC bathes.

The tv series from the early 2000s is a different timeline unconnected to the original movies, just sharing characters and setting. The more recent movies from a few years ago are prequels. Really you could watch in any order, but probably I’d recommend watching in order of release.