At what age did you first give oral sex?

Giving... if I remember correctly, with a woman I was 14, and with a man I was 22, possibly 23.

define oral sex? with ejaculation?

I actually had an erect penis in my mouth at age 11, but i don't think that one qualifies as oral sex(more of a doctor games/dare each other kind of thing).
If you mean with fully sexual intent and male orgasm, then it's 14.

15.

12-15 is kinda a bit broad, don't ya think? At 15 I'd hardly compare myself to a 12 yr old. I'd say 13 and under, and 14-15...personally.

Age 15

i was 12 but i didnt give oral sex i got it :D

I just turned 14. It was really awkward the first time I did it.

15.

I don't know why, but that reminded me of this one friend of mine who was telling me how her boyfriend had just finished performing on her and expected something in return. She told him, "No way! That's gross!" And couldn't see the problem with that.

Around 20 or so, for both giving and receiving.

18. Got it all done in one go.

Does eating a cucumber count? If it does, than at the age of 5.