LOL! That's OK, I know what you mean about PVC and sweat, used to wear PVC jeans to a rock club, and by the end of the night they'd be absolutely soaking wet inside (I danced a lot!). There was also the night a rather drunk woman standing beside me waving her pint of cider around while talking to her mate eventually forgot to hold it level and managed to pour almost all of it down my left leg - while being randomly gunged by pretty strangers is cool, I was glad to be in PVC as it was just at the start of the night. Funniest thing was when she tried to take a drink a few minutes later, held up the now almost empty glass (it had been full) and stared at it, you could see she was thinking "where's my pint gone?".
I did go home after the club and into a shower / bath in them a few times, never actually tried filling them with anything messy though. Planning to get a new pair this year, and get them a size larger than my usual jeans size for comfort (PVC always seems to be cut on the small size) - will have to try some fillage at some point too!
We're actually shooting a scene with Lady Full-Wellington in silver PVC jeans this week, they're quite a tight fit so it'll be interesting to see if we can get any custard poured inside them.