I don't understand why these would be gender locked.

Females can wear the best man suits in the game already. As for the bunny outfits for guys, it isn't as though they would have to be exactly the same for both genders; just look at the swimwear we have. And it isn't as though skimpy outfits designed for sex appeal are exclusively for females, right?

If the outfits are indeed gender locked I will find it disappointing, and also very sexist. I have come to expect better from SE in this regard.