Why isn't my penis standing up?

Yes, fluid exchange may happen even though one uses a condom. In case your worries are regarding it, the most advisable thing to do is to keep an eye on yourself for any symptoms that are not normal for you, such as the ones mentioned as itching, burning, or unusual discharge. One of the advantages of being aware of how your body is functioning is that noticing any changes can help you determine whether it is necessary or not to go for further advice. 

Masturbation is the healthy sexual activity which should be practiced in moderation. overuse of masterbation can cause real problems of health and psychology such as fatigue, back pain, and anxiety. If you have issues connected with your masturbation, seek the advice from urologist or sexologist.
 

Herpe­s simplex virus leads to genital he­rpes. However, smoking with some­one infected won't transmit it. Bliste­rs, itching, and genital pain indicate infection. The­ virus spreads through skin contact during sexual activities. 

I see your point that penis enlargement procedures are possibly a source of worry for you. It's obvious that the majority of the methods advertised are real farces and are detrimental to your health. It is, of course, a surgery that is among the alternatives, yet even if it is well implemented, such as a lack of infections, there are also the inevitable permanent marks. Moreover, the rehabilitation period will not be at least a few days. Never go for a penis enlargement surgery without consulting a qualified experienced doctor, who will help you to choose the best options available. Stay well.

The rabies vaccine is not influenced by the fact that you masturbated. The vaccine can be fully effective even if you indulge in sexual activity. It is perfectly natural to begin sexual relationships with this rabies vaccine. Hence, keep on following the treatment prescribed by your physician.