Warm water bottle when trying to conceive??

Bianca
Hi, my dh and I are ttc and I recently heard a tip regarding the use of a warm water bottle placed against the vagina after your partner ejaculates inside of you. After ejactulation you lie down and place the warm water bottle in between your legs/ pressed gently against the outside of your vagina. Apparently the warm temperature excites the sperm and increases speed and mobility enhancing chances for conception. Has anyone heard of this or tried it? If so, was it successful?