Movie Identification: Humanoid Monster/Alien in a bed, 80s/90s, Sci-Fi/Horror

Question

I've been looking for the name of a movie for over a year now, this is my last chance.

Here are the details which I remember:

• I watched this movie a few times when I was younger, I'd say 80s to early 90s. Might be early 80s when the movie actually came out.
• It had an alien/humanoid/moster that was always in a bed covered until towards middle/end. He looked normal from waste up its what was covered that was monster/alien.
• There was a swimming pool with slight fog in the movie at some point - if I recall correctly.
• It was slightly humorous but not a full-on comedy.
• I remember this alien/humanoid thing that was always in the bed - was a big bed.
• There may have been one scene where there were a few scantly clad women around the monster/alein thing. Someone walked into the room and the covers was moving about then the humanoid/alien/monster popped up, then the girls popped up besides him. Party scene??
• The rest of the family was normal looking - if I recall correctly.
• It was just the father who was like this.
• The monster/alien might be the uncle or grandpa

What is the name of this movie?

I'm hoping that someone has seen this and remembers it so I can see it again.

Answer 1

This is the 1986 film Terrorvision - I had been trying to find the title for forever, myself.

Similarities:

• The movie is from 1986

• The movie contains a monster that can imitate the heads of the people it eats. In one scene it imitates five different people poking their heads out from under the blanket of a single, large bed at a swinger's party. The blanket is undulating wildly through the whole scene, and there are two kids looking in through the door

• There is a large, indoor swimming pool completely covered in smoke

• The monster eats and imitates the heads of the father and the grandfather of the family

Differences:

• The bed scene is relatively brief, and it's the only time the monster is in a bed

• The monster is seen completely many times before and after the bed scene

• The monster is not even remotely humanoid

• It's most definitely an over the top, full-on comedy

• The monster eats the whole family

You can watch the full film online below (NSFW - Horror comedy)