The best pickup line I encountered while in the Army was from one of my crewmen. We would enter a portside bar and he would separate from us and look embarrassed and lost. When an attractive young lady asked him about it he would reply that he was gay – and didn’t think she could change him. Surprisingly it worked a number of times – he had a better scorecard than any of the other men.
There's a song by the Bloodhound Gang (hilarious group BTW) titled, "I wish I was gay so I could get chicks!"
Very true.