Dildos are one of the oldest sex toys, as these were "invented" several millennia ago.
Dildos are meant for penetration, both vaginal and anal. These can be fully controlled, as you are the one who chooses the speed, angle of penetration and type of the motion. Dildos can be used by both men and women, as these adult sex toys can bring satisfaction in lots of ways.
Dildos usually resemble man's penis, but not necessarily, as the range of dildos is wide enough to cover plenty of shapes, sizes and textures.
Even if satisfied enough with your partnered sex, dildo is a perfect way to complement your lovemaking.
Dildo as well can be a nice way to distract yourself while the partner is away or it can help you enjoy sex even if you live a singleton life.