fear of oral

Does anyone else hate the thought of being eaten out but also want it bad?
First time I got eaten out (I was younger) he told all his friends "i stank". Ever since then about 5/6 years I've been too scared to. 
Been with my bf for 4 years and even when he offers I automatically say no. It so frustrating!
I know I can handle my hygiene waaaay better now than when I was younger but feel scarred from that experience.
Anyone else feel this? Any advice?