Compare The Genders: EATING OUT When the check comes, Mike, Phil, Rob and Jack will each throw in $20 bills, even though it's only for $22.50. None of them will have anything smaller, and none will actually admit they want change back. When the girls get their check, out come the pocket calculators. BATHROOMS A man has five items in his bathroom-a toothbrush, shaving cream, razor, a bar of Dial soap, and a towel from the Holiday Inn. The average number of items in the typical woman's bathroom is…