help ; awkward situation

Long story short, I bought brand new handcuffs with black fuzz around them for my boyfriend and I to use. We used them for the first time last night, yay. This morning he upfront asks me if I'm cheating on him, because when he went down on me last night he got a piece of the fuzz from the handcuffs in his mouth. I was appalled, 1. Because I was embarrassed that there was freaking fuzz in my vagina. 2. That he thought I was cheating on him after dating for two years????  He backed up his reasoning for having his last girlfriend cheat on him, the way he found out was because he went down on her and there was tanning oil on her vagina from the dude she just fucked (he was a body builder or something lol tanning oil)