We dated regularly for 2 months. Full caps if done right can be quite undetectable. I've been lucky with mine so far. My biggest problem is long term attachment even with ultra hold. Usually 3 days tops before it starts to come undone. That's with thinskin perimeter in cold temps. Hot Texas weather, I'm lucky to get 2 days of hold. That's a huge problem on vactaions with a female. Anyhoo, I don't think it would have mattered to tell her beforehand. Alot of females simply can't deal with it, and she's one of them despite having her own set of fake boobs.