I've dated a couple lefties, but I'm dating a right-hander now. After 8 months, he is FINALLY remembering where to seat the two of us in relation to one another at a restaurant so we don't elbow each other.
Only eight months?
I've been married to my right-hander for over thirty years now and he has NEVER figured that out!
I figure we lefties are generally more flexible and more adaptable -- we have to be to survive!