Marina Sirtis grabbed my ass once. I went with an ex-gf to a comics convention where she was appearing. We got some photos autographed by her, then we had her sister take a photo with our camera, with her between me and my ex. While we were standing there, she put her arm down and grabbed my ass to pull me up against her side. I've got a big grin on my face in the picture, for obvious reasons. I've had a nerd-crush on her for years.
The ex also went to the bathroom at the same time as her and heard her peeing (and later complaining to her sister about the poor attendance at the convention). It's weird to think of Counselor Troi ever going to the bathroom. I'm pretty sure the Enterprise doesn't HAVE bathrooms.