I'd say it's an 8 for me. 2-3 times a week was steady throughout my long marriage. More at times. It's not the only thing - I'm a physical touch love language person, I could make do with less sex if my partner is generous with physical touch at other times. I don't feel like my sexual drive is any less now in my 60's than it was in my 20's.
It makes me sad when people just accept that sex is supposed to fall off after you've been in a relationship for years. That has not been my experience.
As for the whole discussion of "casual" versus committed sex - I guess it depends on your definitions. Meaningless sex with someone you don't know - yuck. Friendly sex with someone you genuinely care for but have accepted can never be more than that because of their issues can be lovely IF you're both on the same page. Unrequited sex or sex with someone who isn't as I to it as you - yuck.
As for waiting until marriage to have sex - well, I don't desire to get married again, but if I did, I'd sure want to have sex beforehand. I couldn't make a valid decision about spending my life with a guy without knowing if the sex was going to be any good, or if we were going to be compatible on frequency.
