Reese Witherspoon and Vince Vaughn shot a romantic kissing scene on a San Francisco trolly for their upcoming comedy Four Christmases Thursday. Filming happened during a heavy rain.

These two don't look right locking lips. She's all cute and dainty and Vince looks like a haggard old man who's practically lived his past 10 years in a bar! It's just too awkward, kinda like if you ever heard or accidentally saw your parents 'doin it' when you were younger... It's just not right!

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