I remember this move had to do with time travel or separate worlds? There was a group of men who traveled (I want to say by bathtub?) to another world or to the past where women were in power. The women were everywhere and they were the only men, and they were to be experimented on. Had a weird pornographical feel to it, though I know it was not pornography.
There’s a movie called hot tub time machine so that might be where you’re thinking of a tub. The rest of your description doesn’t sound like it though.
The part about being the only men in a society where women are in power matches Sexmission (not pornography).
It must be Sexmission, like Dreamer said 😀 I highly reccomend it!