recent one was a friend of the gf was crashing on our couch for the weekend, i'd woke up with morning wood and had to take a wicked piss, stepped into the washroom but didn't turn on the lights, do my thing and just as i finish the lights come on and the friend walks in, shes surprised and starts apologizing then mid sentence she notices i'm hard and just blurts out "Holy fuck that thing is big" then just stares at it like a deer in headlights, when she snaps out of it she gives me this flirty little smile then apologizes again and leaves.
GF told me afterwards she'd brought it up and was quite impressed and a little turned on after she saw me. ever since the friend has been very friendly.