She was wearing a very tight s…

She was wearing a very tight skirt, and when she tried to board the Fifth Avenue bus she found she couldn’t lift her leg.
She reached back and unzipped the zipper. It didn’t seem to do any good, so she reached back and unzipped it again.
Suddenly the man behind her lifted her up and put her on the top step.
“How dare you?” she demanded.
“Well, lady,” he said, “by the time you unzipped my fly for the second time I thought we were good friends.”