Mmmmmmmm...go out and picket for more males to come work on your unit???
Seriously though...I hear ya! Males who are nurses do get picked out a lot on units by females who are nurses because we know that you all are much stronger than we are. Women still buckle under the presence of a strong male, and if he's kind on top of that, well...there ya go, Hugo!
How about sharing how you feel with them during report before you hit the floor? Have you expressed how you feel to them already? If not, what's not spoken, isn't given much attention to. Perhaps you will need to say to them one by one as they approach you for help: "Hey, you know what Lulabelle, I'd be more than happy to assist you when you need me, how about reciprocating that favor as well?" If she gives you one of those "Ummmm...you talkin' to me?" looks, say: "I'm sorry, but Mr. so and so needs turning right now, so I won't be able to accomodate your desire to have me help you turn your patient too."
Hope this helps, Hugo!
I leave you with this quote:
"A person who doesn't stand for something will fall for anything." -- Peter Marshall
Sooooo...stand up to those nurses about how you feel IF you really desire a change on your unit!