This is actually a pretty good question!
I would say that the Homunculi, despite the fact that they can't reduce, DO have sexual leanings. I mean, think about it. Who is their creator? Their "Father!" And who created him? A human slave who eventually became Van Hohenheim. So as Hohenhem had normal sexual urges, and his blood was given to create Father, so do the Homunculi, who are created from Father.
Lust might have been mostly bloodlust, but I'm sure she craved the cawk too.
Gluttony lusted after Lust
Greed of course wanted it.
Envy, well (s)he could shapeshift. Freaky.
Sloth probably would have wanted it if he wasn't too lazy
Wrath got Mrs. Bradley
And finally, there's Pride. I would certainly say that what you postulated in the OP is potential.
Funny, not even the movie currently being in theaters across the country could breathe much life into this board...
This Saturday Night, on [adult swim]: TOONAMI'S BACK, BlTCHES!! A New Bleach Episode (255) kicks us off at Midnight, followed by the SERIES PREMIERES of Deadman Wonderland at 12:30 and Casshern Sins at 1! Then, we've got 3 back-to-back classics: FMA:B Episode 32 "Fuhrer's Son" at 1:30, followed by GITS: 2nd Gig Episode 17 "Red Data" at 2 and Cowboy Bebop Episode 15 "My Funny Valentine" at 2:30! Also, watch lots of [as] ACTN shows including Durarara!!, The Big O, and more online any time you want at
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