His balls ached, slapping against the backs of her thighs.

His balls ached at the thought of her.

"You made everybody else's balls ache last night with your socialist rubbish," Aylmer said unsympathetically.

If I let her she makes me come until my balls ache.

One afternoon George shot off six times and his balls were still aching when he went to bed.

His balls were aching from coming so many times.

His balls ached as if they'd been filled with a hose.

The man's erection and his balls ached for relief.