If I've never been in love before, should I be concerned?

Before you worry: I've been in love before. So I'm not concerned about myself. (At least not on that count.) Yet I've run into people who haven't been in love. Ever.

Once you've hit your thirties—if not before—shouldn't you have been in romantic love at least once?

This is in no way a criticism. A person doesn't have to be a sociopath to have never fallen in love. In a way, people who've never experienced romantic love are fortunate: They've escaped heartbreak. (For those of you who have borne the shards of a broken heart, you know how truly rending it is—and how long it takes the heart to mend.) In another way, people without past or current romantic love are unfortunate: They've never felt love's transcendental bliss.

Yet I wonder: Are people who have never been in love unable to love? Or are they unable to allow themselves to fall?

Reasons aside for being unable to love or unable to fall—for these are likely myriad—should someone be wary of dating a person who has never felt romantic love?

In other words, is a person's past love or lack thereof a fair litmus test for determining whether it's a good idea to date him with intention? Not that anyone should eliminate someone from the dating pool simply because he has not loved—perhaps he just hasn't met anyone who inspired love in him, even over a series of decades—but is it a worthwhile data point? Similar to whether he gets along with his family? Or whether he likes to exercise?

There's an added benefit to the love question litmus test: You may find he falls in love too easily and is madly in love with everyone he dates. That's an entirely different set of issues.

Tell me: Would you feel trepidation dating someone who had never been in love?