I think this is a terrible piece of advice
Why do you think it's terrible? I would say it highly depends on the individual, same with marriage.
Marriage would destroy my life, having low enough executive dysfunction and dreading going through divorce and drama for more months than necessary, especially for someone inexperienced in choosing, though I have a massive list of (failed) experience behind me, I choose to never have it. Marriage is not a mental state, it's just an array of paper. The decision is in the mind of the people and many marriages, 40% end in divorce and many end in disaster and facilitate stalking. Slightly less chance of divorce if you're an atheist like me, however that didnt convince me it offers anything of substance to my life or a romantic life.
My recent engagement has caused me way more trouble than help. You also have said that you're on your second marriage, so marriage didn't offer you more success. Perhaps it's not about marriage but evolution of choice of partners? I think it takes more than dedication, as 40% of the married people experience, for a relationship to work.
In our days the tradition of marriage has lost its meaning, not a bad change actually as I don't view remaining in unhappy marriages a positive, as well as the sex worker business gaining legality in some states which has allowed for more safety for all parties involved.
Having experience and the virginity pressure taken off a romantic relationship and the apparent desperation would ease up the beginning of a new relationship that is supposed to last. However I suspect that meeting people might be more the trouble.
Having a sex buddy is arguably hard for us autistic people as we never make friends and it comes very hard for us to go about connecting to peers, so it's just easier to buy it. However technically, it is not a physiologic issue, it is an issue of psychology, so the better thing to do would be go to a psychologist to see why the issue of virginity is so big for the person or why they think it should make such a change. As a person with experience, I still feel like a virgin because the sex I had did not satisfy me yet, emotionally. I'm a demisexual and sapiosexual, though, so I suspect other people might disagree.