University mascots flirt with your girlfriend/boyfriend

On university lots, there’s always some mascot (dressed in a cow costume) who flirts with someone who’s already in love with someone else! This always causes a ‘Caught cheating’ memory, and the one who was cheated on will become angry at both the cow and his/her loved one.  I guess it’s not that hard to mend things, just takes a little time. But why does this happen and what can we do to prevent it?!?