If you feel like you've found found your soulmate, but you are too young to commit to marriage, would you ever open your relationship?

I mean, if you feel like she/he is the one, and you don't want to lose her/him, but both of you still feel like you should experiment more before committing to marriage, what would you do?

Would you ever try to open your relationship? Would you ever bring up into conversation a threesome or even swinging (changing partners)?

How would you react if your partner would bring this up? Would you discuss options, or would you break up?

If you would break up, in order for both of you to be able to experiment with other people, would you want to still be friends? Later in life, if the situation is right, and when both of you would be looking for marriage, would you ever get back together (if wanting experimentation was the only reason you broke up a long time ago)?

If you feel like you've found found your soulmate, but you are too young to commit to marriage, would you ever open your relationship?
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