How does the Sims Free Edition make two citizens hug like brothers?

You can hug each other after becoming friends.

Choosing a character's constellation will affect the character's personality characteristics;

After the personality is finally determined, the constellation of the character can be determined (the constellation comprehensively reflects the overall characteristics of the personality). For example, the person who pursues cleanliness excessively will be Virgo, and the person with a particularly balanced personality will be Cancer. However, there is still the question of whether different constellations are harmonious, so it is best to keep the constellations harmonious among family members. See the following figure for the specific constellation harmony relationship:

Aquarius is the most harmonious constellation: Capricorn/Sagittarius is the most disharmonious constellation: Scorpio/Virgo.

Aries is the most harmonious constellation: Gemini/Taurus is the most disharmonious constellation: Cancer/Libra.

Cancer's most harmonious constellation: Scorpio/Taurus's most disharmonious constellation: Gemini/Aries.

Capricorn's most harmonious constellation: Aquarius/Taurus's most disharmonious constellation: Leo/Gemini.

Gemini's most harmonious constellation: Pisces/Virgo's most disharmonious constellation: Capricorn/Aries.

The most discordant constellation in Leo: Sagittarius: Capricorn/Gemini.

Libra's most harmonious constellation: Virgo/Cancer's most disharmonious constellation: Pisces/Scorpio.

Pisces is the most harmonious constellation: Scorpio/Gemini is the most disharmonious constellation: Leo/Aries.

Sagittarius is the most harmonious constellation: Pisces/Capricorn is the most disharmonious constellation: Libra/Scorpio.

Scorpio's most harmonious constellation: Pisces/Leo's most disharmonious constellation: Libra/Aquarius.

Taurus is the most harmonious constellation: Aries/Libra is the most disharmonious constellation: Virgo/Cancer.

Virgo's most harmonious constellation: Aquarius/Sagittarius's most disharmonious constellation: Leo/Taurus.