ENTP's and INFJ's are balanced sexually. However, INFJ's possess a characteristic orientation toward feminine energy while ENTP's possess a characteristic orientation toward masculine energy; each while remaining balanced.
INFJ Female: INFJ females are very feminine, more traditionally feminine than other types. But, they also possess a penetrating masculine intellect. (Tertiary Ti?)
INFJ Male: INFJ males sometimes seem to possess a soft feminine energy in the way they approach people, but in other respects are very strong and masculine.
ENTP Male: ENTP males seem to possess a masculine mode of thought and can seem extra masculine, but are also strangely vulnerable and feminine in some respects.
ENTP Female: ENTP females possess a masculine energy in the way they are direct and assertive, but they share this same vulnerability.
Out of the four types, I think the INFJ male and the ENTP female have the most difficult time in that their primary energy runs counter to the traditional roles of the sexes. The female being the passive receiver and softer, while the male is the more assertive element. Since ENTP women are more assertive, this can be off-putting to some men. Similarly with INFJ men, as they tend to take a more passive role.