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Inability to achieve erection in a male may be due to a lot of reasons. As you have also mentioned that her husband is also not easily turned on so his libido may also decreased.
- Mostly in persons who fails to achieve proper erection, the reason which comes is psychological. Under conditions of stress
, tension of work or anything, anticipatory anxiety
of poor erection etc. individual fails to have proper erection. Some times when an individual fails to achieve erection he may become stressed for next time and anticipatory anxiety develops in him, ultimately he fails to achieve erection due to this anxiety next time and a cycle of stress and poor performance is formed. So to break this cycle your daughter has to work had. Advise her to engage in more and more foreplay. She can discuss with her husband to take medicines like Sildenafil
which help to increase performance. But under guidance of doctor only.
- Secondly get his testosterone
levels checked, as low levels may be reason of poor libido and erection.
Hope I cleared your doubt.