Hello doctor im male 22 years old 77kg...i would like to know why when i have sex/masturbate instead of relaxing i get drained, loose motivation, and higher anxiety specially socail anxiety. thank you?

Psychosocial-sexual: stress reaction with anxiety.Masturbation is normal and can cause a temporary refractory phase,which may make you feel "spent" ( you are and this is normal ). Social anxiety disorder can be treated with CBT ( counseling therapy) and medication.

Complex question.: Anxiety is about fearing NOT being in control or being able to master something (feelings, situations, events). Anything that lowers your ability to deal with the perceived threat can raise anxiety, even drinking alcohol, which usually relaxes people (at first). Does sex make you feel undefended? Unable to cope with the world? Weak? That's my best guess without asking a LOT more ...