I feel humiliated by my boyfriend, is this normal?

Anonymous
So tonight my boyfriend and I celebrated the birthday of a mutual friend. Everything was going well, until we stopped by one local bar. There was this girl; clearly inebriated, who kept bothering my friends and I. Eventually, this one song came on the jukebox and my boyfriend decided it would be a good idea to dance with her. At first it didn't bother me; I mean the girl was WAY drunk and it felt like he and our other friends were just trying to get a rise out of her; trying to make a joke of it. Then, he continued to dance with her!. This bothered me, for one, he didn't ask me to dance with him anytime before the girl came along. THEN he only seemed interested in dancing with me AFTER he had danced with this stranger. It seemed so weird to me; this girl flirted with the other guys, but they just treated it like it was a joke, not giving her the time of day. I expressed my discomfort, like why would you encourage her? The other guys seemed to have no problem rejecting her advances, so WHY would my boyfriend give in? Anyway, he danced with her twice and I was clearly livid; I mean my friend's recorded this shit on Snapchat and Facebook, for everyone to see. He tried dancing with me afterward, but acted all offended when I told him "NO", "Not at least until you wash your hands!" I mean, who knows where this girl has been? I just think it's really disrespectful to dance with a complete, drunk stranger ( and for the record, both were dancing pretty provacitivley) when you're supposedly in a committed relationship. I don't know how to approach him about it though. He was pretty drunk himself, WAY more than me. I don't know what to make of this; if it's a situation of simple drunken stupidity, or something far more sinister.
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I should also add that my boyfriend called this women "beautiful" after the song finished. For what it's worth, she was in no way, "beautiful", but instead, a WASTED, hot mess of a person The whole time I kept thinking "Where are her friends? Who's looking out for her?" My boyfriend knew she was drunk, yet proceeded to not only humiliate himself by associating with her, but also me. It was cringeworthy, watching them dance.
I feel humiliated by my boyfriend, is this normal?
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