So he needs his special underwear.
5 seconds sound clip from the Space Jam movie soundboard.
You can hear this line at 00:43:22 in the Blu-ray version of the movie.
Quote context
[...]
- Nope.
- Ah, but a very nice dinette set.
- So he needs his special underwear.
- Oh. Shh.
- You think she's got enough toys?
- Speaking of toys, you know all those mugs and t-shirts and lunch boxes with our pictures on them?
[...]