“When You cheers you have to make eye contact or you’ll have bad sex for seven years.”
My informant does not remember where she heard this superstition, but he does however practice this whenever he gives someone a “cheers” with a drink. She told me this superstition at a very casual party/dinner setting. This piece of folklore is humorous and was probably told to make people look you in the eye for a “cheers” as a sign of respect. I do not think this superstition is true.