Filibuster question about urination

I think you can see where I’m going here.

It’s my understanding that during a filibuster, you cannot leave the floor, else you relinquish it. What do congressmen and women do if, you know, nature calls?

Seems some just go where they are.

Which leads, in some cases, to charges being brought. Interesting.

STrom Thurmond hold the record for longest continous filibuster by one speaker at 24 hours, 18 minutes in 1957 when he singlehandedly block school desegregation legislation. He prepared for the marathon speaking engagement by dehyfrating himself in the Capitol steam room, so that he could drink some liquids without have to urinate.,2933,90552,00.html

Would somebody preview that for me, I obviously neglected to.