Biden's accuser says that he pushed her against a wall and inserted his finger(s) into her vagina.
Given that this was 1993 and she was wearing a skirt, I'm guessing she had on panty hose. It was more or less de rigeur in those days, in an office setting and the US Senate was more conservative than most workplaces. In fact according to Wikipedia's entry on pantyhose (tights to our English readers)
This accords with my recollection. Obviously a fashion trend is no kind of proof that she was or was not wearing them.From 1995 a steady decline began, leveling off in 2006 with U.S. sales less than half of what they had once been. This decline has been attributed to bare legs in fashion, changes in workplace dress code, and the increased popularity of trousers.
I am by no means going to paint myself as some kind of sexual expert. However, in my limited experience with cooperating and suitably garbed young women, this is not easy.
This is not the main reason I have for disbelieving Ms Reade. In the same way that Kavanaugh's behavior (his year book entry and his subsequent 'innocent' explanations) makes me believe Dr Blasey Ford, Biden's general behavior leads me to disbelieve this accusation.
I have no doubt that others will weigh in and tell me I am wrong: and I am certainly willing to be convinced.
Edited to correct a typo.