If I run my fingernail along the inside of my thumbnail on my left hand, I HAVE to do so on my right
This is number-related because if I relaise I've done it on one but not the other, I have to even it up - but I can't just do a single, I have to do them each in turn until they're in sync, but ensuring that the nail which was down by one in the first place ends up with one more than the other.

I'm not making this up. I wish I was.
(Darth Foxtrot A one-man army dedicated to making fetch happen, Fri 11 Nov 2011, 11:24, 3 replies, latest was 14 years ago)

This ^ is the kind of mental I was going for

( sporters I’m sincerely gratitude to you, Fri 11 Nov 2011, 11:26, Reply)

If I crack one finger, even by accident
I then have to crack the rest.
( Agnostic Antichrist Baltimora, Fri 11 Nov 2011, 11:26, Reply)

finger off
to crack to leave
+ aurant
( Bill Clay a.k.a. Claudio, Fri 11 Nov 2011, 11:31, Reply)

officelol

( sporters I’m sincerely gratitude to you, Fri 11 Nov 2011, 11:36, Reply)

That was too much effort for the result.

( Fucking hell Jeff I am not a robot, Fri 11 Nov 2011, 11:36, Reply)

I disagree

(Darth Foxtrot A one-man army dedicated to making fetch happen, Fri 11 Nov 2011, 11:37, Reply)

That's what he said
(!)
( Bill Clay a.k.a. Claudio, Fri 11 Nov 2011, 11:38, Reply)

Oh dear, *somebody's* an amateur autist.

( Kroney, Fri 11 Nov 2011, 11:27, Reply)