Question for the girls about 'the girls'

Ladies- when i do long swims in salt water the little sea lice get stuck in my bathing suit and eat away at the 'girls' . I have insanely itching welts, any prevention tips...besides swimming topless:)
Comments
Milko
http://mvgchannelswim.blogspot.com
If the cells don't make it to the skin, there is no reaction, and therefore no sting. Apparently, even wearing pantyhose can be protective (I've never tried it though.)
I am thinking some Vaseline/grease gets absorbed into the skin, but "enough" Vaseline/grease should be protective.