WTF is this commercial for a famous brand?

If you haven't seen this long commercial before, you'll never guess what it is advertising. The reveal is at the end.

for the record, i trimmed out exactly 2 seconds of this: a full-frame ECU of the mother's nipple before the baby starts breastfeeding. subway! eat fresh

— Ryan Simmons (@rysimmons) June 27, 2019

FAQ:
Q: Is this real?
A: Real as you and me.
Q: Who made it?
A: A firm called Stink (!) out of their Brazil office with director Salsa (?)
Q: Is that a little boy peeing?
A: Yes.
Q: I got it right on the first guess.
A: That's not a question, and no you did not.

— Ryan Simmons (@rysimmons) June 27, 2019

MORE FAQ:
Q: Is he peeping on his mom?
A: I don't think so, but anything's possible.
Q: Is the sandwich artist the girl he kissed?
A: See above.
Q: When he shaves his head after the heartbreak, is he becoming an incel?
A: Without a doubt, 100% yes.

— Ryan Simmons (@rysimmons) June 27, 2019