In Germany, there’s a superstition that failing to make eye contact while saying cheers will result in seven years bad sex.
But… you know you have some say in this! I think of all of the times I failed to make eye contact and it scares me, but I served all my sentences concurrently and I got off early on time served.
Ironically, failing to make eye contact often leads to bad sex by itself. The alcohol is just a facilitator.