>>1609776(me again)
I watch a lot of harem-type anime. Nyan-Koi, Rosario+Vampire, Omamari Himari, and tons more.
Don't try to find the psychological reasoning behind it, I strongly doubt there is one.
Ecchi content doesn't turn me off a show, nor does it turn me on to one. Sometimes it can be a nice addition to an otherwise bland anime though.