Not 44, but I got into my thirties without having ever done the deed.
It was awful; absolutely crippling. Everyone else has done it, why haven't you?!
Every interaction with the opposite sex became grotesquely poisoned by this nagging insistence that if I just said and did the right things, I might be able to Have Sex With Her.
I was completely unable to have any sort of female friend because of this. My female relationships were all just placeholder potential shags.
I'd manipulate relationships, jostling to position myself are the Right One, the Fallback (now known as the 'nice guy routine', rightly pilloried.) It was shameful.
And I couldn't ignore it, or get over it. My rational mind drowned insisting it didn't matter, that I'd find someone and all would be well. Every dating site ad, every wedding photo or date night photo gallery felt like a direct stab, mortifying me.
In the end, it all came good. I met a lovely girl, things moved in the right direction, without weird manipulations. We just clicked. I was embarrassed to tell her she was my first, she didn't care in the slightest. It got better and better from there.
A few years passed and things didn't work out. The second was even better. And so much easier, without that awful sexual Albatross distorting everything I said and did. I know it's a cliche, and me circa-2006 would flat out refuse to acknowledge it, but it's hard to believe it was such a big deal.
Advice? Are you in good health? Are you active? Social? These are the healthiest ways you can 'prepare'. Laying groundwork for a better you makes relationships easier to slot into.
You don't have to be a fashion model, hitting up museums every night but just doing things means you'll be so much more fore-armed, when a potential right one comes along. If she's smart and nice, she won't care in the slightest. :)