tam and senga

Tam gets home and the first thing he does is flop onto the sofa and demands "Senga, get me a beer before it starts!"
Senga strolls through and passes Tam his beer.
After about 2 mins Tam, again, shouts "Senga! Quick get me another beer before it starts!"
Once more Senga passes him a beer and yet once more Tam shouts "another beforee it starts!"
Senga storms through and shouts "Listen here you lazy fat beggar, get up off your lazy ass and get the beers yourself and stop barking orders and...."
Tam mutters to himself at this point "And there it starts!"