I practiced oral with string cheese.
Haha. Yes really. My first real "experiments" with sex were online with good male gaming friends and crushes. I had never seen an adult male nude, and I'd never (until then) known my own body. So when one of my friends told me about oral and asked me if I was a gagger I said "I have no clue." We chatted for a bit and he told me I should practice, he said "bananas are good, but string cheese will build you up to it."