I'm on the other side of this. DP is mid 40s, and properly hit peri-menopause a couple of years ago. Alongside the hot flushes and all the other bollocks, she also suddenly had a massive sex drive and developed the ability to orgasm (she'd never managed to have one before, either by herself or with a partner)
Prior to this, we had sex on average around 5 or 6 times a month, usually clustered around ovulation. So her being up for it pretty much every single day has been an experience!
I've always thought that I had a really high sex drive, that I'd happily have it every single day till the end of time, I just never had the chance to put that theory to the test, as all my partners have had a lower sex drive than me. Turns out when actually given the opportunity, about 3 or 4 times a week is all I need.
Largely, it's been a massively positive experience, but we have both had to learn some things. For me, I've had to learn that I don't always have to take the opportunity, I can have a night off if I want. For the first year or so I was pushing myself to have sex pretty much nightly, because I spent years not getting as much as I wanted, and who knows how long DPs newfound sex drive will last. If I don't make the most of it now, then will I regret it in the future etc.? I found myself getting slightly resentful, even though it was because I wasn't giving myself the permission to say "not tonight"
For DP's part, she's had to learn to accept rejection. Prior to this, she almost never initiated, and on the rare occasions she did, the chances of me turning her down were almost non-existent. So that's been a learning experience for her. She's also had to get in the habit of sorting herself out as well. She wasn't really one for masturbation before, she couldn't orgasm so just found it a frustrating affair.
We also seem to have a lot more assymetrical sex than before, where either I'll just get her off or she'll just get me off. I suppose it's the equivalent of going out for dinner all the time vs once a year. Because it's not a rare occurance, we're happy just having a quick dessert, rather than feeling the need to have the full three courses, because who knows when we'll have the opportunity.
Largely, I'm happy with the situation (although I wish it didn't come with all the other peri-menopause side effects, which are kicking DPs arse). DD heads off to uni in September though, so we'll have the house to ourselves, and I'm slightly worried DP is going to kill me through over-exertion!