Both are a play on words.
A tennis ball!
They are both ment for boys but in the end it's the men who plays with them
So the men can go on Reddit and repost this joke.
A nun with a javelin in her throat. (The only joke I can ever recall when asked for one. Told to me by my art teacher in Grade 11. Needless to say, he was my favourite teacher)
Take my word for it.
Because they don't know the words.
The Thesaurus
Synonym rolls.