i really don’t know how else to explain it, i admit feminine is not exactly the right word but it’s just that due to heteronormativity and gender roles that girls can have that manner of speech without people thinking anything strange about it. for males you really have to consider their relationship dynamic. those members are like kids to hao, so it’s not anything to note. now imagine if taerae spoke with that aegyo tone to him unironically . in any case, ask any straight Chinese dude if he’d want to be called gege by his friend 1 year younger, i guarantee they’d think it’s odd.