When Dr. Gio Serrell goes on an expedition on the alien planet Stellar 9 with Ikis, one of the friendly locals, he expects to collect new and interesting data. But one sip from a foreststream ruins that when Ikis explains the water contains a powerful aphrodisiac.
Gio becomes horny and desperate, but is he desperate enough to trust Ikis, a 9,5 feet tall alien, to take care of him?
Definitely an element of suspended disbelief. Geo drinks Horny water and talks his alien guide into relieving the itch. This is my kind of territory. I'm comfortable with the 'alieness' of it so the fact that "I" like it is probably not a recommendation to those that do not follow along those tastes. With the size difference, male parts included, slow and steady is the key and the author didn't run rampant with the penetration.