there's a quote from a book i have on astral projection,
you will not be able to project if you just want to be a psychic voyeur
lol i love that 'psychic voyeur'. in all seriousness. you can project and visit people on this plain, or in their dreams. it can get rather sticky though. entering ones dreams is hard because everyone has a shield up whether it is known to them or not, so your spirit needs to be stronger. second, people seeing an astral body is the same as someone seeing a spirit. it's possible, but not everyone can.
why would you want to 'remote seduce' someone? [i mean, i know "why", just, why can't you talk to them?] there are many other, easier, options that don't involve being a 'psychic voyeur'. my personal favourite is the grade 3 way 'do you like me? yes no maybe' works every time. seriously, try deviation to figure out if the person likes you.