Mixing paints 

Masturbatingthrowing one off in secret!

Famous TV artist Tony Hart is in is bedroom wanking to classical music.
Mum:"Are you ok Tony?"
Tony:"I'm just mixing my paints mother!"

Mixing paints by Wee Ron September 12, 2004

mixing the paint 

Sticking it one hole then the other.

Mixing the paint is not a rusty trombone...it's the other hole.

mixing the paint by Towely_jr December 3, 2013

paint mixing

Complicating a simple black and white situation. Such as taking black and white paint and mixing it to form gray. Commonly utilized by liberals as a foundation for their side of an arguement resulting in fuzzy logic.

I found myself confused after talking to a liberal. He assured me illegal immigrants were not criminals through the use of paint mixing.

paint mixing by David Foster December 13, 2006