I never like sparring with girls. Im a good sized dude and I generally have to take pretty much everything out of my strikes when I spar with females. Not trying to sound like a badass or anything, its just the nature of being larger and athletic (im 6'2, about 235 lbs., not fat). I feel like a major asshole if I accidently hurt my training partners. Im not some sexist asshole either, I dont like sparring with little dudes either. Same problem.