Why do you find less hurricanes occurring in the southern hemisphere?

The northern hemisphere has a bigger proportion of land mass. As land absorbs heat faster than sea, the northern hemisphere is warmer. This heat then gets transferred to the oceans, warming it up. Therefore the oceans in the northern hemisphere are warmer. The warmer the oceans, the more latent heat energy they transfer to hurricanes, thus creating more and powerful hurricanes, especially in the summer.

im still to figure out how the heat from the land gets transferred to oceans. It is most probably via winds (although they travel toward land at day and towards the oceans during night) or by the ocean currents, which are heated when in direct contact to land and then passes on the heat to the western littorals (eastern sides of continental land masses), where hurricanbes form.

Well this is what my geography teacher taught me anyway...

Hope ive helped