I love to try new things. I have done more than anyone I have talked to about it (or more than they would admit to), but the one thing I WILL NOT try is anything involving the waste products of the body (i.e. feces and urine). That is just gross. I imagine there would be more things I wouldn't really want to do, but that is all that I have utterly and completely drawn the line on.
I didn't use to like anal either LR, but all it really took was a magnificent lover and tons of foreplay to bring me around.
