Will never forget mine; was with my first girlfriend. It was actually at the end of our first proper date, although we had know each other a while. She was giving me an amazing blowjob, really wet and sliding my full length in and out of her mouth - I was in heaven! Anyway, as I was getting close I told her I was going to cum, half expecting her to stop and maybe finish me by hand, but to my delight she speeded up and before I knew it for the first time I was experiencing the glorious feeling of cumming hard in a girls mouth...amazing. Even better, she swallowed every drop, gulping as I shot what felt like a pretty big load in her mouth, and after she finished gave me a lovely big grin. She even went to kiss me and tasting myself on her tongue really turned me on too, I still love tasting myself on a girls mouth after shes just taken my load.
Damn I need a blowjob now!