If you say that periods can be a masculine thing and women can have penises it means you can widen the scope of transgenderism because people can transition without the hard graft.
All the fun of playing dress up with none of the life changing commitment of brutal surgeries.
It's either sheer laziness to commit, a deep-down knowledge that they're actually too damn scared to fully commit, or they've decided to troll society until it bends to their will to provide "essential trans gender healthcare" (read surgery) at the snap of their fingers. I.e., if you won't give us surgery at the drop of a hat on the NHS then we'll just force everyone to say that these sex-based biological functions and features can be a characteristic of either sex.
Which leads to the question- if all of these biological features and functions are sexless, how can you have any right to demand surgeries, hormones and puberty blockers? "I'm a man so I want medical intervention to remove my breasts and stop my periods." Reply: "why on earth would you want to do that? Men also have periods, breasts and vaginas."
Men can even get pregnant now apparently so any desire for a so-called "man" to surgically alter himself to appear more manly should be shot down as bigotry. In fact, how fucking dare you insinuate that men can't have breasts, wide hips, periods and wombs. Bigot.