Casual open sex... Should help holding stress at bay of any kind. I guess birth ratio should also be healthy.

Rarity and Rainbowdash are quicky experts... Neat.
I guess Rarity needs some focus exercise. She forget teasing the tits... How rude

this was great! I love casual sex stories.

This could have used another once over to catch all those little typos, but this was still good. Casual sex stories are often fun and it's interesting that you're starting post-friendship school instead of at the start.