I agree with the others here, there should be at least a little more than this before you go public with the doc/idea. At current there isn't much to go on and if I can be frank you could probably cook up several pages worth of lust weapons in an hour if you don't care about spelling or about it sounding at least reasonably plausible.
I can offer some suggestions though:
1. An ornamented bow that shoots larger, more powerfull versions of the love darts(cupid's bow).
2. Pheromone grenade that's more efffective the more enemies there are.
3. Myr whip, a bio weapon designed to siphon off the user's energy to excrete a synthesized version of the red myr's venom that gets into the target's bloodstream with every strike.
4. Accessory, sexy speakers, shoulder mounted speakers that constantly plays sounds of sexy moaning and orgasmic gasps/cries. Lust increasing effect per turn.
5. Licky/sucky disks, thrown disks that attach themselves to the target and constantly lick/suck them in a sensual manner, extra lusts damage if you hit an erogenous area.
The last two are a little weird I know but my point is people usually aren't usually moved by things with little content. Work on it a little more, finish it if you want to and then see if you can get one of the devs to take a look at it.