Yess I forgot about this! Also, it sounds weird, but wasp spray (the kind that shoots 15 feet so you don't have to worry about getting near the nest and foams on contact) is some of the best stuff ever if you can't carry pepper spray. You have better aim and range because it's a continuous stream instead of a spray, it sticks to clothes and eyes, and is a serious irritant. Plus foaming stuff is nearly impossible to get out of eyes (trust me I would know) so it'll slow them down a lot.
GO FOR THE GROIN, regardless of whether they've got a penis or not it works. That area is tender, and it is a person's center of gravity so it will knock them off balance. Don't go for the stomach, if they are v. muscley or v. fat it won't work. Make your hands into little bird's beaks and go for the eyes. I learned this in IMPACT
