Trying new things ๐Ÿ™ˆ

So i'm on holiday and whilst speaking to my SO on the phone he mentions that when i return he wants to try "new things" in the bedroom.. he also hinted towards 69. I've always been so shy to allow him to go down on me incase he gets grossed out. I need help on how to overcome this fear because i don't want him to loose interest.

HELP!