Hello Wood
Consistency and volume of penis erection depends upon number of factors like
How frequently you meet a woman?
Nutritional status
secretions of
prostate and seminal vesicles
Hygiene
there are medicines available for
erectile dysfunction, you need not to worry you can ask your doctor for
sildenafil group of drugs
In my opinion you need not to worry,this is not a serious problem
If it gets even thinner or lumpy than it could be urethral discharge
You should consult your doctor for seven analysis or urine culture to rule out the possibility of UTI
Have plenty of fluids
maintain good hygiene
Multivitamin and food supplements to boost your heath and vitality
Make your bedroom your bed room more conducive and appealing for sex.
Spend more time in foreplay and take your time
Hope you will find my response informative and helpful please feel free to ask for follow up questions, I will gladly answer you
Best wishes