sensation problems

my boyfriend is very “old fashion”, or so he calls himself. he won’t ask me for head as he thinks it’s disrespectful, but if i initiate he’s all for it. he’s not very open about how he feels, what he likes and dislikes. he always says thank you and you’re doing so good. when i ask him what he likes best, he gets shy (im his first) most times he has performance anxiety and goes soft before it can get in. If he likes something, I have to tell by his facial expression. I have to try new things as we go, and see on my own what he likes. What else can I try? sucking his balls, eating his ass? i learn from the moans. i want to get him so excited it doesn’t go soft.