[Robodog]

It's not just homosexuality, she doesn't like any display of (what she would describe as) overt sexual behaviour. Whoever is doing it, gay or straight.

And it's not even a straight attitude,

I know gay people who can't stand all the OTT gyrating sexual displays you get at Gay Pride for example - they find it really cheesy and stereotypical and often pretty vulgar.

People have different thresholds of what they call vulgar, i suppose.