Since his original form was too overpowering, Jupiter/Zeus would transform himself into a horse, ox, eagle, or other animal in order to befriend and seduce his love interests. At one point Zeus even transformed himself into golden rain to seduce Danae. Not even his wife Hera, godess of marriage, could stop Zeus from sneaking out and having sex adventures. His sex drive was simply too powerful and insatiable.

What separates himself from Mars/Aries or Sun/Apollo is that Jupiter/Zeus was a mutable type(Jupiter rules Sagittarius) which wants variety and short-lived encounters. The astrological symbolism for Sagittarius is the centaur which is half human and half beast. The upper human half is highly intellectual and spiritual, but the lower animal half is bestial and lustful.

Centaurs were lustful and often violent creatures easily given to revelry

Also, being the God of gods, Jupiter/Zeus was able to get away with most of his sexual exploits without repercussion or accountability. Who can question the ultimate authority? This position also led him to get away with some evil and unspeakable punishments over others. In short, he got what he wanted and no one could stop him.

Jupiter/Zeus as an eagle carrying off Ganymede to his lair

This is why Jupiter in the natal chart or even synastry is often a powerful indicator of sexuality. Jupiter conjunct, trine, sextile, or oppose a personal planet can trigger passion and sexuality. The moon transiting or progressing your Jupiter can really put you in the mood. Where is your Jupiter and how does it affect you sexually?