There is a way to do this right. Go slowly. Don't introduce the other person until the idea of your seeing someone becomes familiar to them. In other words -- don't overwhelm them with it, but don't hide it, either.
If you are on good terms with your 20-somethings, talking about dating can be a fun, shared experience.
One word of warning: if you're thinking about "sexting" your latest hot date -- don't. Especially if you have a tendency to leave your phone around with 20-somethings at home.
You'll get busted.