First of all, please note that the overall concept of this drawing, particularly as expressed in the title, is purely fictional in nature. Indeed, I am not, nor have I ever been, married to a yeti. My real life husband is considerably more civilized and somewhat less hairy, and dislikes cold weather. That said, if some hypothetical woman were to marry a yeti, she might say something like this:
I’m not going out on a worldbuilding limb and saying yeti are necessarily interfertile with baseline humans, but if they were, the teenage offspring of just such a marriage might look something like this. If this family were living among humans, or in a mixed species community, the kids would probably go to a school that requires everyone to wear some kind of clothes. Junior here would certainly whine about it, demanding to know why he has to wear pants when his dad never does, but school rules are school rules, and the bike shorts are actually a pretty good compromise.
I could just as easily have chosen cutoffs or cargo shorts, but the contrast between the tight fitting solid black of the bike shorts and the kid’s fluffy hair coat just seemed funny to me.