Most babies start to experience separation anxiety at this age. It's very normal and the "cure" is to give him what he wants. The more love and attention you give him through this phase the quicker he will get over it. You are his primary care-giver and his food/comfort source. He's very uncomfortable when he has to be separated from you right now and not without reason. If I was only 8mo and didn't understand anything going on around me I would cling to the familiar voice/bosom that means all of the things I need too.
It's nothing against your husband and he shouldn't take it personally. Don't be afraid to go to the bathroom without him though. A little bit of brief separation, with mommy always coming right back, can also teach him something he needs to know and that is that you will always be back for him no matter what. Just avoid any extended separations (like over 15-20 minutes) until he moves out of this phase.
And this IS going to pop up at other times in his development. They seem to go through cycles, especially if there's anything BIG going on developmentally at the same time, like learning to walk or starting solid foods etc...
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Edit: I just read the post below mine and I literally CAN'T BELIEVE WHAT I'M READING!!!! Julie L., are you REALLY advocating for women to give up breastfeeding? Seriously? Wow, you've really got the wrong idea about babies and what they need. Breastfeeding is the BEST thing a mother can do for her baby and it does NOT exclude daddy. There are a million other ways that dads can bond with their kids. Many husband will have mom lean back against them while breastfeeding so their face is in the picture too, and many will take over all diaper changes while they're home etc.. There are tons of ways for dad to get himself involved.
I truly can't believe you said something as STUPID as "it's not fair to the dads for the moms to exclussinvely breast feed". You do realize that moms have been "exclusively breastfeeding" for the entire history of the human race and it's only in the last 100 years that there has been another option, right? You do realize that thousands of generations of dads have been able to bond with their babies without feeding them, right?
"Because so many mothers today breastfeed" - SERIOUSLY? Breastfeeding is how God and or Nature (depending on which you believe) INTENDED for human infants to be fed, and it's how they've been fed for MILLENIA. Your opinions fly in the face of all that is common-sense and backed by tons of serious research and collective experience.
Sorry if I offended anyone, but I don't want anyone to take her post seriously. It's really a shame that anyone could feel this way if you ask me. I exclusively breastfeed and my husband is very bonded to our son. It in NO WAY excludes dads.