Ji mai sex karne ko sochata hu to mera ling tite ho jata hai uske bad sochte sochte usme se sparm bahar nikal jata hai,ji aap mujhe ye bataye ki mai der tk sex karu our mera jaldi se sparm na nikale mai jb chahu tb nikale ,ji our ye bataye ki mera ling bada our mota kaise hoga plz you help me.plz