A visit lasts only an hour and a half to two hours. Once you've got five, aliens have a 15% additional chance to come to your lot.
Gifts are a great way to increase your Relationship EXP.
You can't give gifts to characters right away after meeting them.
The goal of a dating sim is to raise your Relationship EXP with characters and after falling in love, to have a happy ending with them.
Raising your Relationship EXP can be done by talking to them, giving them gifts and going on dates.
An Easter egg is a message hidden in the object code of a program, movie, book, CD, DVD, or video game as a joke, intended to be found by persons disassembling or browsing the code. Some of these are hidden in the actual game play and others are hidden in the code.
The reappearing llama reference is an old joke from Maxis dating all the way back to Sim City 2000, when the speed names were "Pause", "Turtle", "Llama", "Cheetah", "African Swallow".
Talking to characters will increase your Relationship EXP with them.
You will need at least 100 Relationship EXP in order to give them gifts. Dates are a great way to increase your Relationship EXP.
This guide will teach you how to get an Alien, Alien babies and Male Sim pregnancy, and the special abilities Aliens get in The Sims 3.