mandatory? no. but it should not be a secret that you're in a relationship. keeping things private & mfs out your business are different from keeping ya partner hidden. that's just MY opinion though.
ALSO, my dude is VERY comfortable & secure in his sexuality, so him letting me do a finger so I can get practice on doesn't make him "homosexual" or anything of that nature. he SUPPORTS ME & wants me to be great in whatever my heart desires!