"...If the speaker was having the experience with her girlfriend, the dog wouldn't have been a male but a female for her to get interested in homosexual animals...."
well, since the pooch was named Buster, it was likely male......so that passage goes to the idea that male canines have a voyeuristic affinity for lesbians in the act....... heterosexual males usually will observe intently if presented with the same opportunity......so the butch's queens pooch is a straight male, I take it?
"Hollywood" lesbians and Johnny Cash looking butch lesbiasn are two different things.
The reality doesn't match the illusion.
And just so you know, those porn stars aren't attracted to the overweight old guys they have sex with either. It's a job.