Answer her question followed by some cuddling: It's awesome and doesn't slow me down at all. I know a way how to use them to swim even faster than an olympic gold medal owner.
Return the cute succubus's cuddles, hugging and entwining with her in the water, resting my chin on her shoulder. "Interesting... How about a race then? To the other end of the pool and back."
Accept that help with gusto, but not by using any sharp objects like scissors or knives...only through being on knees while my partner is standing in front of me