Futa is a horrible fetish. Good luck finding the less than 1% of people in real life who you could enact your fantasies with assuming they wouldn't hate you for fetishizing them, which they would.
If you need a dick on your female to get off to them, then spoiler alert you're gay. If you think it enhances a normal female, then spoiler you're bi. There's really no other reason to be into this shit.