This isn’t a case of logic, it’s a case of observation.

It’s also a joke. There are very few Democrat leaders that get involved in gay sex scandles, not because they don’t have gay sex, but that their base doesn’t care. Most of us just call it “sex” unless we have a specific need to differentiate. Some additional factor is required to make it a scandal.

Republicans, though, officially disapprove of gay sex. So anytime one of them is caught having any, automatic scandal.