Alien movie I think? Please help!

I’ve been looking for this movie for the longest time but no hope.  The little I remember is that involved alien-like beings on a spaceship. It’s like they were experimenting on humans by having sex with them.  The aliens peeled off parts of their own skin and had black and white stripes underneath and they had long claws they could retract I think.  I saw it somewhere in the late 90s or early 2000s. That’s all I can remember. Please help, it’s driving me crazy trying to find out what movie it is.

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