Yeah, I think you'd have had different answers if it was losing your sex organs completely, and with it, your sexual urges and pleasures.
For me, I'd happily trade in reproduction for immunity to disease and aging.
However, immortality in exchange for any future sex... that's a tougher one, as the way I see it, if I have forever, then I need entertainment to fill that time, and I know of one particular thing I can do which never gets boring, and if you take that away, well, I'll have read, watched, heard, listened to and played everything eventually.