Strap On is the term used to refer to a sexual toy that is strapped to one person to be used on another person either to tease, perform oral and suck on, or to penetrate (vaginal or anal). Strap Ons are tools for females to use on their partner and can be very popular during Female-Female-Male threesomes, so if you feel like trying something new discuss it with your partner and see if you both like the idea. If you do then it is just a matter of finding the right one for you.