What made Quartermain explode with laughter?

Quartermain exploded with laughter when the men would not give Good his pants.

“Nay, my lord,” answered Infadoos, “would my lord cover up his beautiful white legs (although he is so dark Good has a singularly white skin) from the eyes of his servants? Have we offended my lord that he should do such a thing?”

Here I nearly exploded with laughing; and meanwhile one of the men started on with the garments.

“Damn it!” roared Good, “that black villain has got my trousers.”