Public Speakers often use gestures that mean things in Sign Language that may disturb or offend people in their audiences. Speakers who use those signs usually do so repeatedly. I'll try to describe the gestures and tell what they mean without using offensive language.
Holding both hands above the waist with palms up and fingers separated and slightly curved, then pulling the hands down refers to body parts used for nursing babies.
Holding hands below the waist with palms facing each other and the tips of the thumbs and fingers touching those on the opposite hand is very similar to the sign for female reproductive body parts.
People who understand either sign will be distracted from what speakers are saying if they see them.