Trixie accepts a drink form a fan and returns to the aboad of one Twilight Sparkle whom she is currently staying with

and from there we see a clear message as to why you shouldn't drink after you start to feel a little tipsy

Twilight having taken the unicorn in while she tries to find a home attempts to help the mare to bed to sleep off her buzz, however Trixie under the influence of her drunken state she pulls Twilight into bed with her and uses a new spell to satisfy some newly found urges brought upon herself by the alcohol

by the end of which Twilight finds she has some new experiences to discover as part of a new life project