In Ghostbusters 2, Sigourney Weaver took her shirt off just before she was to give her baby a bath.  Why did she do this?

After the iconic "panty" scene in the original "Alien" (1979), Sigourney Weaver revealing her underwear in movies became something of a Hollywood inside joke.  It was even the subject of and SNL skit....and as you may know, the "Ghostbusters" franchise features a lot of SNL/Second City alumni...

Fan service trope. A woman gets undressed just for the sake of entertaining male viewers.

Maybe she didn't want to get it wet.

So her shirt wouldn't get wet. 

So she wouldn't get her shirt wet.

It was the 80s. She was wearing one those hypercolor shirts and didn’t want the hot water to make it turn orange.

🥴

Parents bathe with their babies. 

I guess they dont where youre from.