建物ファック ビルオナ
[[masturbation|Masturbating]] by rubbing or grinding on a [[building]] or other large structure. The character is usually, but not always, a [[giantess]] or a [[giant male]].

h4. See also

* [[crotch rub]]
* [[table humping]]
* [[giant]]
* [[Tag Group:Sex Acts]]

h4. External links

* "Wikipedia: Object sexuality":http://en.wikipedia.org/wiki/Object_sexuality
building sex