Ohhhh I love it ANYTIME ktspktsp has an erection. Especially if it's due to my presence.
So if he is hugging me, from the front or behind, and I feel his dick against me... mmmmmm I love it.
In public is even better, though that doesn't happen often.
When I was single and went dancing at clubs, though... if some dude got a hard-on while dancing with me, that would be gross! I don't remember that happening, but I am sure I would have run away quickly if some guy did that.