Is my smart phone, my smart tv and/or my computer watching me?

I think so I was talking to my mom about buying something and when I checked my face book. There was an add for the poster tube I was talking about. But I am not suspicious

Only when you're NAKED,in the BATHTUB,or MASTERBATING.!!

They even watch people who change their clothes. 

Yes.  Tracking your location, too...

yes it is and it is stalking you and keeping tabs on you.

yes smart phones can spy on you , its called hacking , another use can turn you camera on and you dont realise it , apple a few years ago had hackers who could watch you via smartphones ..

Remember that just because you are paranoid, 

that doesn't mean they aren't watching you... 

They all are and are conspiring together also

How many times do you need to be told to comprehend those facts?

Yes, they all are.