2713
Issues discussed include the validity of the MMPI Mf scale , questions of sample representativeness , whether " straights " can do adequate research on homosexuality , differences in heterosexual and homosexual sexuality , the role of subculture acculturation in homosexual psychological adjustment , and the use of cluster - analysis to generate typologies of homosexualities .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None