This method keeps your kitchen cool and saves you from having to painstakingly remove the corn silk. 

Fresh corn on the cob, in the husk
Butter (optional)
Salt (optional)

Place corn, with husks still on, in the microwave. Cook on high: 1 ear 2-4 minutes, 2 ears 6-8 minutes, etc. It varies, depending on your microwave.
With oven mitts on both hands, remove corn from microwave and place on cutting board.
Cut off stem end of each corn ear about 1 inch above where the kernels start.
Hold corn upright by the top end (with the silks) and shake and squeeze until the corn pops out the bottom.
You will have a perfectly cooked, husk- and silk-free ear of corn, ready for butter and salt.