A building sex:
1. any sexual activity with the people in a position that looks like a building.
2. Two or more buildings shaped like they are having sex.
3. having sex on top of a building
4. having sex with a building
1. Andrea: Man yesterday there was some sort of public sex in a park filled with kids and the sexers looked like a building. Adam: YOU SAW BUILDING SEX??!!
2. Have you seen building sex?
3. Yesterday we had building sex.
4. Tomorrow I'm gonna have building sex.
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