Being a scuba diver myself I can say that he is indeed very fortunate. Unfortunately scuba and coffee dont really co-exist. But a coffee after a days diving is great!
Cold water has the effect of removing fluid from the tissues etc (due to vaso-constriction) and delivering it to the bladder to be expelled and the consumption of caffeine only serves to exacerbate this effect, leading to dehydration and an increase in the risk of decompression sickness.
Anyway I digress...
Coffee is definately one of lifes pleasures to be sure.