Good writing draws on the author's emotions and experiences in life, building a scene in old aches and triumphs. Honestly, if you're the author and it's meant to be an emotional scene then I think driving yourself to tears is a sign you're on the right track.In a more general sense, people cry over emotional scenes in books, movies, songs that hit their heart strings at the right angle... all kinds of things. It's more common for women to *admit*, but based on my experience it's just about as common in men, they just won't cop to it. Sometimes the tears are just a reaction to a strong surge of emotion and it overwhelms someone enough that their system reacts by crying as a kind of overload valve.... and seriously? Don't worry about 'normal'. Most of the time it's like a kid worrying if they're being 'grown up' enough: the only answers are usually "yes" or "who cares?" Just like there's no such thing as a 100% average person, there's no such beast as a completely normal person. We've all got quirks and preferences and feelings of some kind that others don't, as long as they aren't harming anyone, it's best to just make peace with who you are and live how you want.