threesome sex and twosome sex is just vastly different in so many ways. I think that either would be fine as a first time, as long as there is the understanding that you are still a virgin to the other way. I was a virgin to threesome sex when I was much older.... some are virgins to twosome sex until later also. nothing wrong with either as long as everyone is comfy, in control of themselves and being respectful and communicating honestly with everyone.
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