What are the most common sexual adjustment problems?

Desire disorders: lack of sexual desire or interest in sex.
Arousal disorders: inability to become physically aroused or excited during sexual activity.
Orgasm disorders: delay or absence of orgasm (climax).
Pain disorders: pain during intercourse.

Labor costs would be a large factor holding production of shade-grown coffee back. if it requires higher labor costs to receive a smaller benefit per hectare, then these costs would be prohibitive on expanding this practice to all coffee growing.