Ex-water polo player checking in.
I read the post description and immediately thought of my own experiences with co-ed teams and then I read the OP and you’re in the same boat I was in all of those years ago.
For the record, we had a very small team. Between the JV and varsity teams, we had enough girls for a combined girl team but most other schools we played did not. Therefore, the girls on the varsity team were used during games just like the boys were. We also played against schools which had girls on their teams as well.
As to your point, we (meaning the boys) played against the girls the same way we played against each other. The issue of “touching” only came up once and that was during a game. One of my teammates was guarding a girl and during play, she turned around and shoved him in the face and yelled “Quit f*cking touching me!” We were all kind of shocked because he was a pretty shy guy and it didn’t really fit with his previous behavior. After the game, he told us that when she had been on defense, his crotch had been grabbed really hard several times and he was pretty sure that it was on purpose. In any case, he told us that when the situation came up he had put his arm around her waist (not legal but acceptable when performed under the water). He figured that if she was playing defense the way she was then he was entitled to as well. I’m not defending him, I’m just relating the story as he told it. Incidentally, players from other schools later told us that the same thing had happened during their games which led us to believe that she was using it to get buys to play pretty soft defense against her.
As for the girls on our own team, the issue never came up. I think that they took it as a point of pride that they played on a “boys” team, against other boys, and could hold their own. And I have to say that at first we (the boys) were pretty protective of them during games and would have kicked the shit out of any guy who we thought was just going in for grabs. However, we quickly learned that they could take of themselves quite well, without any input from us.
So I say that you play the game the way it is supposed to be played, regardless of gender. I would be that if you asked any of the girls on your team, they would tell you the same thing.
BTW, belladonna, 90% of water polo happens underwater. On my first day of practice our coach told us that if it happens underwater it is legal. It is just part of the game. Of course, the other side of that coin is that you can fake something happening as well in an attempt to get a foul.