Touching the pot to count it?

[TheEleven]

Last night I was playing in a friendly home game. Small stakes - $20 buy-in NL sit and go's basically.

Question is: during one hand, heads-up, one player went all-in. The other player in the hand started grabbing at the pot and stacking it to get an accurate count so he could calculate the pot odds. Is this allowable while the hand is live? If not, can the dealer or someone not involved in the hand physically touch the pot to get an accurate count for him?

Like I said, it's a real friendly game, but I was still taken aback that anyone would actually touch the pot while action was still live.

Thoughts?