It's obvious that what happened one year ago or something didn't cause any reaction in the electorate of the Democratic Party.
I mean, the Senate Hearing Room, one of the most sacred places of democracy, has been turned into a squalid porn movie set. Homosexual porn, to be precise.
I think you're projecting your own biases there. As far as I can tell, the general US response to this wasn't especially focused on the gender/sexuality either way (certainly not in the mainstream), it was more an issue of time and place. Even so, I'd expect even
less of negative public reaction if it had been a straight couple (especially if the woman involved was deemed attractive).
Look at it this way. Kamala Harris has been accused (somewhat unfairly I suspect) of "sleeping her way to the top" due to her relationship with a married (if separated) man in the past. I don't think that has done any harm to her campaign though. On the other side, Donald Trump is often quite boastful about the attractive women in his life, but the only issues he's faced being based on alleged lack of consent or comments about his own daughter.
Any candidate (male, at least) revealed to have had secret homosexual relationships would likely face much more difficulty, and even open and honest gay politicians still face some level of pushback from US politics, media and public, albeit more subtle than in the past.
The problem is that homosexual sex is considered "locker room, comradely fun between hunks" and not something scandalous.
I have absolutely no idea where you're getting that impression from. I've never seen that kind of idea expressed anywhere, especially not publicly.
Every time a congressperson or a politician has a heterosexual intercourse (vaginal intercourse), the feminists have an inhumane reaction (you know similar to the reaction many had when Trump was elected).
Most politicians are married and will be presumed to have sexual intercourse with their partners. I fear you're conflating normal relationships and accusations of
non-consensual sexual acts and I'd so desperately hope you'd be able to understand the different reactions to those two things.