This basically soundless short animation has a man standing with his rear out as another man approaches and slaps his butt.
The two are wearing everyday clothes, and the title announces the interaction as "Gay."
Then the two men are in the same exact positions and scenario, except they're wearing baseball uniforms. The title then announces "Straight."
The intended humor and point is that there is no difference but the uniforms.
The ad is a more educational approach than a similar butt grab effort in a