No, that's not true. I personally can't live without the app that warns me there are only four squares of toilet paper left on the roll; it sure saves me from some awkward moments. And it turns out that many of us are at. While having a romantic massage with your other half at a nice spa, for instances, the masseuses, thinking you're just male business associates on a business trip having a massage as a freebie, might ask things like, "So, how long have you been working together? Risky, since their's a good chance if he's younger that he'll immediately run to his folks and tell them.
Don't keep things from your partner; it's a lie of omission if you fail to disclose things - it's nearly as bad as outright lying. Want to join? Are they serious about you to the point where you are meeting the people that matter most to them?
Just remember the strain it will put, and when you're ready tell your parents.