One who becomes uncomfortable when put into sexual situations. Depending on the person, they may also be uncomfortable with smaller things like, kissing or even hugging.
"The other night he was about to say good night to her and give her a kiss but she shut the door in his face before he could." says Bekka
"Oh she is such a sexaphobic sometimess, one day she'll get over it if she really likes the guy." says Renee