Why did Frey give Skirnir his sword?

Frey gave Skirnir his sWord to ensure that Skirnir would have the means to protect himself and accomplish his mission of wooing the giantess Gerðr. The sWord was a powerful weapon, capable of fighting on its own, and Frey wanted to ensure that Skirnir had the best chance of success. However, in giving up his sWord, Frey would later face consequences, as he would be unarmed in the battle against the fire giant Surtr during Ragnarök. This act highlights the themes of sacrifice and the costs of love in Norse mythology.