Myself and DP don't have sex very often, but the last few times when we have, he has found it nigh on impossible to climax through penetration, and has been finishing himself by hand.
I know this is a tricky subject and I have suggested he might want to see a doctor, physically he is fine, can maintain an erection etc. He is asthmatic and this is why I have been making him stop when he is clearly struggling to finish as it were. This is not a common problem, we have 2 DC! So I am wondering whether it is worth him paying a visit to his GP?