Exhibit B -- Last week, Lowe posted a pic with his son and Chris Pratt.

\"Threesome,\" Lowe wrote.

\"I don’t condone this caption,\" Johnny replied.

View this post on Instagram

Threesome.

A post shared by Rob Lowe (@robloweofficial) on Aug 9, 2019 at 9:30pm PDT

And the hits keep coming.

Lowe posted a topless pic at the beach and wrote, \"Weekend.\"

Johnny replied, \"Plz god no.\"

You are getting the point.

View this post on Instagram

Weekend.

A post shared by Rob Lowe (@robloweofficial) on Aug 2, 2019 at 10:55pm PDT

It's not all snark between father and son -- even if the posts still stay far from cloying.

The elder Lowe recently wrote a post saying: \"Testing out the swing and mustache at Pebble, @johnnylowe says it’s a no go. Thoughts?\"

The response was quite sweet: \"Tbh I’m just jealous cause i can’t grow one.\"

View this post on Instagram

Testing out the swing and mustache at Pebble, @johnnylowe says it’s a no go. Thoughts?

A post shared by Rob Lowe (@robloweofficial) on Jul 25, 2019 at 4:09pm PDT

He picks his battles, that Johnny Lowe.

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