I think it means passing fluids through a kiss. You kiss someone and then let the fluid in your mouth trickle into your partner's. For example, your friend can't move and is thirsty and there's a fountain nearby but you don't have a cup to bring the water to them, so you drink some water and keep it your mouth and then pass the water to your friend through a kiss (see, I kept it all G-rated! Yay for me!)
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I think it means passing fluids through a kiss. You kiss someone and then let the fluid in your mouth trickle into your partner's. For example, your friend can't move and is thirsty and there's a fountain nearby but you don't have a cup to bring the water to them, so you drink some water and keep it your mouth and then pass the water to your friend through a kiss (see, I kept it all G-rated! Yay for me!)
PS: your icon rules \m/