Im not understanding why my boyfriend cant stay hard during sex. It seems to me if he isnt getting an "in and out" action he goes soft. During oral if i stop for just a minute or less hes soft again and also when Im on top he cant stay hard. He is on ADD meds and stress medication but he only takes the stress meds when needed. I really need help understanding this.
(It is weird, I tried to edit my last reply but it does not show up for me.)
It seems like he can't concentrate and stay aroused. This can be because of the ADD and stress, as well as a side effect of the medication. It sounds like a 'mind' problem, rather than a 'physical' problem. Only while there are physical stimulation will he stay aroused. As soon as his mind needs to get involved, he loses his arousal.
When you are on top, it seems like he loses his concentration. Try to keep him more involved. Talk to him, ask him to do 'stuff' (stimulating your breasts or clitoris can never be bad). Keep him more active and involved.
He should also speak to his doctor. ED medicines are sometimes used with these conditions/medicines. His doctor will know best.