Cum layers appear on sim's face when....(see message)

[amadaeo69]

My sim will have sex, not even have a load in the face, yet he'll have the "cum mesh" displayed. Takes a shower..it disappears until he kisses someone..then they BOTH have cum on their face. I cant figure out why this is happening out of the blue. I've not added any new sex animations etc...Ideas?

[amadaeo69]

I found the error / culprit. I had used WW to give females who are teen/adult / elder the cum slut and polyamorous traits. When I removed cum slut, had the sim take a shower, then kiss again, no cum appeared..so not sure if its a bug tied to the trait to large numbers of people at once or not. 

Video for reference..first kiss is sim with cum lover trait. Second sim is one I removed it from..so its def that..