You should find it flattering, since research suggests that the closer people feel towards you the more likely they are to "catch" your yawning.
I agree with suppressing or minimizing it though. I mean, there's no real reason to open your mouth wide and make a massive noise or something. It's possible to yawn discreetly and cover your mouth, sure. read more
Ahh... I wish I had the excuse of having my eyes closed when I drew mine now, lol. Unfortunately that's my best... read more