How do I explain this to my husband?

I may not want to engage in inter course every day but I crave an orgasm every day. So therefore I turn to my vibrator and that hurts his feelings. When we do have sex, it’s great. It’s at least once a week. Sometimes three times. For us having 2 small kids I feel like that’s efficient enough although he would prefer sex daily. Sometimes I just don’t feel like doing that. I feel bad about it, but he’s welcome to masturbate and use toys when I’m not in the mood to get penetrated. He still gets offended that I am willing to use my vibrator daily but not want him. I’ve explained many times, my vibrator is not personal I don’t have to connect on a deeper level with it and it’s simple. I turn it on, within 3-5 mins I’m orgasming and it’s a release for me. More of I get mental clarity after and I’m able to take on tasks I didn’t have a clear mind for before hand. He feels that way with sex with me and that’s why he’s upset. I don’t orgasm through sex. Not even oral. I don’t expect him to make me orgasm, although we have tried to and it’s never worked. So really, I just need him to understand that when I use my vibrator it’s not that it’s better than him…it’s just that it’s quick and easy. Someone tell me I’m not alone in this. He makes me feel like it’s wrong of me to do. I have sex with him as often as I humanly can before it becomes a chore to me. But it’s hard to want to have sex every single day when I don’t orgasm from it. If I was guaranteed an orgasm through sex, I wouldn’t need toys.