Welcome to HCM.
Most of the times failure to get good erection is lack of sufficient sexual stimulus. Try fantasising about things which sexually stimulate you most, while engaging in sex.
Certain medicines also reduce the sexual urge, such as those used for diabetese or hypertension
If erectile dysfunction
persists, consult an urologist
and he should be able to advise you correctly.Viagra
tab. has to be strictly taken under medical supervision as fatal incidents have been reported with it.
Wish you all the best.