Can Autism cause a low sex drive?

Hello, any insight would be greatly appreciated. My boyfriend of a year has autism, he got diagnosed during the summer last year, when we were first seeing each other and I didn't mind at all and haven't since, even if it makes things difficult sometimes. He has high functioning autism, which means he functions well for someone on the autistic spectrum, but he stresses very easily and overthinks a lot. 

Something I've also noticed is that he very little wants to have sex. I don't have a high sex drive myself, but the last time we had sex was 6 weeks ago, and when he doesn't show any interest I can't help but feel bad about myself like he isn't atttacted to me. He's blamed it on stress or erectiel dysfunction before, but now he's saying that he thinks it might be his autism.  A psychologist told him that when he has sex, it's on his terms. He doesn't like it that he doesn't want it much either as he feels he's not a good boyfriend or 'manly' but it doesn't bother me as long as it's not me that's the problem. Is it common to have a low sex drive with autism?

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