How to talk to neurotic boyfriend about sex?
My boyfriend (age 34, I am 35) was a late bloomer, and is extremely neurotic about his sexual performance. He does have reason to be - he's not very adept at foreplay and he usually lasts a minute or less. On the rare occasion he doesn't climax quickly, he usually can't climax at all. He's only had one other serious girlfriend, who I suspect may have been faking orgasm because he has (what I consider to be) unrealistic expectations of what it should take. He told me that his ex never once failed to orgasm when they had sex. I think I do pretty well considering his issues, but it takes some mental gymnastics on my part. Over time I'm losing interest in having sex with him at all.
In the beginning of our relationship I tried making gentle suggestions, and he either ignored them or took them very personally as if I was criticizing him. I've asked for oral sex (which he does relatively well), but he has a frustrating habit of getting up to go rinse his mouth out before continuing. I finally told him this was like resetting the score to zero and starting over, and he's been a little better about it.
I'm just scared that I'm going to scar him for life if I say the wrong thing. He asks what I need to become more interested in sex, and I've told him I'm nervous to talk to him about it because he seems so insecure. He hasn't said, "Go ahead and tell me, I can take it, I want to know". Are my fears legitimate? Is there any good way to tell someone that they're not good in bed? Or is this a job for a medical professional?