Cannot agree with you more! es[ if the act from opposite sex.

I am more appreciated if the kind act is from someone towards an elderly, a couple, a disable person...

A kind act from an opposite sex, because he/she feels attracted to the person - it has a "questionable" motif. Although to some, such acts would become some sentimental memories buried deep in the heart. That is fine too.

I always will remember the French guy told us, when we asked him why he was so kind to let us ride his car back to town... He said, he was doing it because he hoped when he travelled, someone else would help him the same way he helped us.

This is Good Karma. I believe it.