Responses
I think it also has to do with some of what @my ideal knight Ingris expressed...men are condemned for masturbating and Feng yu has been longsuffering for quite some time maybe the pleasure was a bit much for him...plus since men are supposed to be dainty and beautiful they wouldn't have much physical strength like the women do...men like the personal guard (Han)of the princess are scrutinized as being something similar to "tomboys" for excelling in martial arts. It's truly a role reversal kind of world!(づ ̄ ³ ̄)づ

Nothing wrong with pegging a guy but I didn’t see anything that would suggest she’s pegging him. Which, in the long run doesn’t make sense as to why he’s acting like she blasted out his back. And in previous chapters, it was stated that the girls still get pregnant. So like... what?
Is he getting peg, does she mysteriously have a penis like a female hyena, or the first consort is just a wimp?