Um…yes and no. I have a friend, who I have known for 8 years now, and who I dated briefly when we were around 15 (so I knew him like 5 years then). We fooled around then, but only once. The relationship quickly dissolved and we fought and eventually because of a lot of things we didn’t see each other for 3 years. During that 3 year timespan we did talk and a few times brought up the idea of dating again, and at one point I said I didn’t want to date but would be friends with benefits. Nothing ever happened though. I always felt too guilty/ashamed/afraid.
After the 3 years though, I still wouldn’t call it FWBs, but we had one night of vulnerability, in which we fooled around. And that complicated our friendship greatly, because we were flirting and potentially going to date before that, but so many things changed. For about 3 months after that, I wanted to date him, but he eventually told me he wanted to be friends, because our friendship is too important and he didn’t want to risk losing it. Makes sense. After he told me that I did propose FWB after a while, and he got quite upset with the idea.
But, here I am now, occasionally doing an online camshow with him for pay. Sure it’s not really FWBs, and we aren’t really doing anything much. But sucking his dick is still sucking his dick.
My situation is a bad example, but I would recommend staying away from sex with a friend, unless neither of you attach any intimacy to sex AT ALL. Or neither of you are very close to each other and wouldn’t mind losing each other in the long run. I didn’t even have sex with my friend, but it still almost ruined our friendship.