I didn't know my mind had such capabilities

The other day Twistmaster called me.  I picked up and nothing.  Silence.  So, I called him back.

Twistmaster:  Hello?

Me:  Hey, sorry.  I don't know what happened.

Twistmaster:  You were masturbating weren't you?

Me:  No, it's not needed at the moment. 

Twistmaster:  Come on, admit it.  You were masturbating. 

Me:  Actually, I was reading. 

Twistmaster:  Ah, so you were mind masturbating.

Me:  Huh?

Twistmaster:  Your mind was getting pleasure from reading.  Mind masturbating.

Me:  Oh.  Well.  Kind of.  I'm really tired, so it's more of a battle.  One side of my mind wants to sleep.  But another part really wants to read more of this book.  The side that wants to read wins.

Twistmaster:  I see.  So, it's like a forced fuck.