Times the Tenth Doctor has needed the loo

Army of Ghosts:

When a Cyberman passes through the Doctor, it's very cold for him, and uncomfortable, as it passes through his crotch area as well.

After checking out the Void Ship, he asks to be shown the breach where it came through, then walks to the left and gets called to the opposite direction by Hartman. He was going to use the toilet next to the canteen.

Runaway Bride:

He does a pee pee dance while waiting for the ATM.

He bounces subtly behind Donna at the reception.

He seems annoyed and uncomfortable at the offer of a long christmas dinner. Makes up an excuse about the TARDIS drifting off to the middle ages. Like the TARDIS would ever leave him..(except due to the HADS)

Smith and Jones:

He is uncomfortably bouncing the radiation towards his shoe, as it was in his bladder.

the Shakespeare Code:

He once again goes the "wrong" way. This time to make use of the Thames presumably.

Sound of Drums:

Never use a vortex manipulator with a full bladder..

Partners in Crime:

He shakes his shoulders and sniffs, to shake off the need to pee.

Fires of Pompeii:

While Donna mentions volcanoes, he leans forward with his hands in his pockets, and an uncomfortable look on his face.

Forest of the Dead:

He stands at the top of the stairs with legs crossed.

Stolen Earth:

He shifts uncomfortably at the Shadow Proclamation.

Planet of the Dead:

He walks off from the bus saying he'll be "back in two tics". Lady Christina proceeds to RUDELY follow him.

Waters of Mars:

He says he really should go, meaning TWO things..

End of Time part 1:

Apparently hearing about slaughter and saucy meat makes time lords have to pee.

Minnie REALLY shouldn't grope him when he has to pee..

End of Time part 2:

He wriggles at the news that they're not going back to his TARDIS. He tries to explain it, as he unfortunately must, only to be pushed down a flight of bumpy stairs and brought to a ship in orbit. He then wriggles his legs trying to cross them while tied up. Poor Doctor..

When seeing a young Rose walking home, winces at the large need to pee. Apparently he didn't learn anything from the left shoe thing. "too much to drink" isn't entirely untrue. It's just rather "too much nuclear level radiation absorbed"..