Possible. Say IF the issue of sex belongs to the
karmic challenge of the couple. Which goes to say that if either
party have difficulty in getting sexually intimate, it will test
the overall structure of the relationship, depending on the
preception, mindsets and attitude towards their own
relationship.
Some people have this natural aversion to sex. In psychology, they
would probably tell you your parental axis influence, early
childhood development and such. In astrology, it is shown similar
to the above discipline, in addition to affliction in 8th house,
especially with negative Saturn influence. Sometimes, it is caused
by scenarios - e.g. Rape, abuse, in which alienate one's preception
towards sex.
Do not be mistaken that every BGR required sex upfront. Sex doesn't
always automatically come as part of a relationship; it's an emotional privilege
that is shared mutually in one's most comfortable
state. In simple, if somehow, either party is
uneasy with the notion of having sex, which means one is not
emotionally ready/balance and which means one is NOT in his/her
most comfortable state, therefore it doesn't satisfy the above
conditions... thus nulled.
To plain phucking or make love?
A whole new world of difference. Exercise your judgement to decide
if your man belongs to which category. 
Cheers
