Male circumcision is the cutting off of a small amount of skin from the tip of the penis.

VOA: special.2009.04.01

And the idea is that you discovered at some point in your development that you lacked a penis.

这个观点认为,女性会在发育的某个时期,发现自身缺少阴茎。

耶鲁公开课 - 心理学导论课程节选

He opens the door to the room, and there is a picture that Camille has drawn of Dean: a portrait of him completely naked, and it notes his penis in that picture.

他打开房间门，看到有一张画,是卡米尔画迪恩的一张裸体肖像，画上还画了他的阴茎。

耶鲁公开课 - 1945年后的美国小说课程节选

Closer examination of the animals' anatomy revealed that the sea slugs had a large part of their penis coiled up in a spiral inside their bodies, which they would then use to replenish their missing part.

BBC: Sea slug's 'disposable penis' surprises

You can find strong statistics, and useless investment signals from butter production in Bangladesh, the US population of 9 year old kids, and now, in a dramatic breakthrough, relating average penis size to GDP growth, a key measure of stock market returns around the world.

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Scarborough Hospital said it was prevented by patient confidentiality from revealing whether any operation to re-attach the man's penis had been a success.

BBC: News | Health | Man severs own penis