This happened many years ago. But I have never really told anyone about it. So as the title says, I went to a church lock in. These two girls who were good friends both had a crush on this other guy (not me) and they were very obvious and kind of catty about at the lock in. At some point this guy went home because he wasn't feeling well, but they continued to fight.
Fast forward to later in the night we end up playing a version of truth or dare. Nothing crazy happened because we were church kids and the chaperones were... Well chaperoning.
Any way during this session of truth or dare it is revealed that I haven't even so much as kissed a girl. I felt pretty embarrassed because everyone kind of laughed. I definitely was behind everyone else with how old we were (highschool). I didn't really expect anything to happen, there was no indicator or either of the two girls having interest in me.

At some point in the night I get shaken awake, it is one of the girls, and she whispers "meet me in the bathroom in 5 minutes and I'll give you your first kiss." Without waiting for my response she skampers off. I look around. Everyone is strawn about in sleeping bags and they all seem very asleep. So I wait for what I thought was 5 minutes and go to the bathroom. I go in and she immediately pulls me in and gives me a kiss on the lips. I ask for another, she obliged and then left the bathroom.
I get back to my sleeping back and right as I was falling back asleep, I feel a shake and a voice ask "what did you guys just do?" It was the other girl. I tell her we kissed. She asked if we used tongue, which we didn't, so I told her that. So then she tells me to meet her in the bathroom if I want to experience a kiss with tongue. So I wait a minute and excitedly hurry off to the bathroom where she explored every part of my mouth with her tongue.

So I go back to my sleeping bag and a little while later the first girl is back asking what we did. So I tell her and she is like, "well have you felt a boob before?" And I hadn't so I tell her and same thing to meet her in the bathroom where she kisses me with tongue and lets me feel her boobs over her shirt.
Repeat, the second girl asks again what we were doing and she says well I'll let you feel under my bra. So of course I do. So then back to the first girl and she says well I'll let you feel them and see them.
This continues where each time they try to out do each other.
Girl 2: suck on her nipples.
Girl 1: suck on nipple while touching my dick over my pants.
Girl 2: touching my dick under my pants.
Girl 1: touching her pussy over her underwear.
Girl 2: touching her pussy under her underwear.
Girl 1: Finger her pussy.
Girl 2: Finger her and lick her pussy.
Girl 1: lick her pussy, then kissed my dick over my underwear.
Then finally, girl 2 gave me a blow job and I came in her mouth and she swallowed. Then girl 1 did the same. It was incredible. The last incident, girl 2 had me pinned dow in the bathroom and she was kind of mad as she was sliding her pussy over my dick because she didn't want to lose her virginity to me. She finally chickens out and says she can't do it. And when I went back to my sleeping bag girl 1 never came again.
Church was very awkward for a while, and I don't think the two girls ever made up. I'm surprised I'm not religious now after that experience!