Martha Lang-Wescott’s Treehouse Mountain appears to be the only place where you’ll find a small number of thoughts on Eros, but only as Eros, not delineated by sign. I suspect that’s going to be addressed more in the books she offers:
The Sexual Astrology site offers more, but I have to qualify this reference by adding that I am not familiar with the person affiliated with this site, so I can’t recommend them with the same kind of assurance I can the other sites I usually offer. On the other hand, she’s a VP with her local chapter of the NCGR, and that does speak clearly to her credit:
“If Eros is in the sign Pisces then you’ll experience love and erotic pleasure when you’re deeply connected to a lover on a soul level. More than any other placement perhaps, Eros in Pisces is looking for the ultimate soul mate ideal – the one love who will complete you. It’s possible that you’ll find this, however at the same time you are open to more disappointments and delusions in love since you want so much to believe in the best about the one you’re in a relationship with. Eros in Pisces can feel the emotions of other in a magnified way and this will enhance your compassion for your lover. It will also help you to psychically tune into what your partner craves in sexual and love relationship. At its best, Eros in Pisces is malleable to deliver and surrender to a lover with unconditional devotion.”
Hope that helps.
at http://cafeastrology.com/sexualastrologyeros.html it’s said:
“There is a chameleon in this position of Eros, as these lovers are very adaptable to their partner. This is not to say these lovers don’t have sexual preferences or possess a strong identity. Instead, the Pisces compassion, and ability to understand and accept virtually every color of the rainbow shows through in a sexual/romantic way. They tend to be most comfortable and at ease when their partner is expressing him or herself confidently. This position also suggests a passion for Pisces-ruled subjects.”