semen

I heard somewhere that semen doesn't break down in the stomach, and that if you consume enough of it you have to eventually get it removed with a pump or something

is this true?

Actually, if consumed in too large quantities it can get jammed in the stomach, and you will indeed have to pump it out at the hospital. It happened to Bukkake star chi sachimachi, there was an article about it somewhere, i'll try to dig it up.