Museum display told me hindus worship Shiva's "manhood". Is that true?

Christian here. I was at the Denver Museum of Nature and Science today, they have a special exhibit currently titled "Anghor: The Lost Empire of Cambodia" which has a lot of hindu and bhuddist statues and artifacts. In one display they had a linga, and the description said it was a representation of Shiva's penis and that hindus make offerings too it. I've never heard this before so I asked my wife who is a hindu and she said she had never heard that either, and then she told me a story about Shiva being cursed by a sage so people only worship the linga now. Is there an actual basis for what the museum display said or is this bs?