Question

joe feels low on energy, doesnt feel attached to his significant other, has low libido and trouble having an orgasm, and doesnt feel very romantic. which hormone is mostly likely at a low level?
oxytocin
vasopressin
serotonin
endorphins

Explanation:

Oxytocin is associated with social - bonding, attachment, sexual arousal, and orgasm. Low levels can lead to feelings of disconnection from a partner, low libido, and orgasmic difficulties. Vasopressin is more related to social - recognition and pair - bonding in a different context. Serotonin affects mood, but not as directly related to attachment and sexual function in the described way. Endorphins are related to pain relief and pleasure, but not the main hormone for the symptoms described.

Answer:

oxytocin