Genuine woman moment. It can't be said enough. Ralph thinks it's just the alogs aloggin' him, but no. It's really not. He has so many feminine tendencies it's actually insane. With this and his obsession with buttholes, the most logical and unironic conclusion is that he's a closeted homosexual. Off the top of my head, there are two explanations for this behavior:
1) Single mother. I'm not sure how old Ralph was when Sandra and Ronnie split. I honestly don't think it happened before middle school, but Ralph's womanly behavior has all the hallmarks of being raised by a single mother. Even when they were together, you'd imagine Ronnie was busy with having psychotic episodes and all that fun stuff. (Of which Ralph would also inherit!)
2) Ronnie diddled Ralph more than we know. That would explain a hell of a lot more than just why Ralph is so feminine, but you can't help but speculate. It'd also point A LOT of fingers why Ralph's go-to holler whenever he's feuding on a woman's behalf. (e.g. some parental figure he's hollerin' at either diddled then or is related to someone who diddled them.)
Note: There are definitely more than two, but those are the ones that jump out at me.