Apparantly so, but not good for you.

"When is that supposed to be?" You ask her, annoyed.
"Oh, I don't know. When the opportune moment presents itself, I suppose."
"An opportune moment to show your balls to me? Have them wobble around while you walk? I assume they do that since your legs hit them."
"That they do. And they have the most supple smooth white skin too. Completely hairless of course. They are also not as fragile as yours. I can't hurt them if I accidentally bang them against a door frame or trip and fall on them. They aren't as hard either; they have a bit of give like semi-hard rubber."
"They sound like they are very nice," you compliment as you roll your eyes.
"Don't get cheeky with me...well, more cheeky," she laughs as she pats your butt. "I can do many fun things with them. They can shrink if I cum a lot, then puff up again later. That might come in handy if I wear a dress, or for other uses."