These are ones I actually thought were the real lyrics initially.
“It’s good to warm my balls beside the fire” - Home (Pink Floyd)
"I'll stay with you till my seeds are dried up" - Sunshine of Your Love (Cream)
“Everyone avoids me like a cyclone ranger” – Turning Japanese (The Vapors)
“You’re an all gas-o-matic” – Orgasm Addict (Buzzcocks)
"Baby you can't hide your lion eyes" – Lyin’ Eyes (Eagles)
"Streets are run, even when you're down" – People are Strange (The Doors)
Others I just twisted.
“Count the head lice on the highway” – Elton John
“I ain't a Martian anymore” - Phil Ochs
"Oh, a storm is threat'ning, library life today" - Rolling Stones
"Tears in my sperm, while I'm waiting for my turn" - Bob Marley
“Pissing the night away” - Chumawumba
“You better get your bags and flea” - Simon & Garfunkel