<human>: Can you succinctly summarize the text in 1-3 sentences?

*Didn't get anything thought-provoking from /r/lgbt. Thought I'd try here.

The recent marriage equality development sparked frustrating dinner table conversation . Anytime same-sex marriage comes up in the news, my dad argues something to effect of:

> "If same sex marriage is allowed, then what is stopping somebody from marrying their dog?"

I understand how ignorant this sounds. But I also acknowledge that my father has little to zero interaction with anyone LGBT; Did not pursue higher education (College, the first place that I learned to empathize with the gay community and gay rights); and regards news corporations like Fox News as reputable sources of information.

**How would you respond to this argument?
<bot>: My dad says that same-sex marriage might condone other instances like marriage to animals, marriage to inanimate objects and polygamy. I am at a loss on how to argue something so blatantly ignorant.*