How do I make it all taste better??

I feel so bad. My boyfriend tried to go down on me and he didn't go for long later on he said that it tasted weird. I told him I didn't want him going near there anymore an I feel bad because all he wants to do is 'satisfy' me as he says.  I showered and cleaned up before everything happened too. I don't want him to be grossed out by something I didn't even know was going on :(..I just don't want to ruin it because I've never done any of this before. Seeing as I'm not experienced, I try looking up ways on what to do. I just need advice!!