Notice a sudden upsurge in men on leashes? Don't be alarmed, it's just International Mr. Leather weekend once again. This is the 25th year for IML in Chicago. Aside from all the partying, the schedule includes a seminar on "financial planning for alternative lifestyles" and a panel on the psychology of kink. Events will be held everywhere from the home-base Palmer House Hilton to the House of Blues to the Metro (the contest itself is at the Congress Theater, Sunday night). So remember this weekend: if someone says you really chap their hide, it might be a good thing.